Barrage (artillery)

From Wikipedia, the free encyclopedia

German barrage on Allied trenches at Ypres. Probably Second Battle of Ypres, 1915.

A barrage is a line or barrier of exploding artillery shells, created by the co-ordinated targeting of a large number of guns firing continuously. Its purpose is to deny or hamper enemy passage through the line of the barrage, to attack a linear position such as a line of trenches or (as a creeping or rolling barrage) to neutralise the enemy in the path of an advance by friendly troops. It contrasts with a concentration, in which all the guns aim at the same small area.

[edit] Development of the creeping barrage

A 4.7 inch gun firing over open sights during the Battle of Magersfontein, South Africa, 1899.

The barrage was developed during World War I. Until about 1915, artillery usually fired over open sights at visible targets, and the largest unit accustomed to firing at a single target was the regiment or brigade, of up to about 25 guns. Trench warfare led to a necessity for indirect firing through the use of observers, more sophisticated artillery fire plans and an increasingly scientific approach to gunnery. Guns had to use increasingly complicated calculations to lay the guns. Individual guns were aimed so that their fall of shot was co-ordinated with others to form a pattern; in the case of a barrage, the pattern was a line. The term “barrage” was first used in English in the orders for the battle of Neuve Chapelle in 1915.^[1]

A lifting barrage was a development in which the barrage lifted periodically to a target further back, such as a second line of trenches. This was countered by the defenders infiltrating troops and machine guns into no-man's land or the areas between their own trench lines, so it was found necessary to comb the entire area of the advance with artillery fire. A creeping barrage (also called a walking barrage^[2]) was a barrage that lifted in small increments, perhaps 50 yards, so that it moved forward slowly, keeping pace with the infantry.^[3] A rolling barrage was more sophisticated still, with two or more curtains of fire, one behind the other, so that when the batteries firing the rearmost pattern ceased fire to lift the barrage, there was no pause or gap in the barrage. Those batteries lifted their fire to become the forward edge of the barrage, and the pattern was repeated to keep the barrage rolling forward without ever ceasing.^[4]

Initially the lifts of the creeping barrage were pre-programmed; that gave rise to problems when the infantry attack did not keep up with the barrage, or was slowed down by it. By the end of World War I the barrage could be made to move in complicated ways, with the barrage wheeling even combing back and forth across the same ground to catch the defenders re-emerging after the barrage had passed,^[5] but it was still governed by a timetable. By World War II, as techniques and communications improved, the barrage lifts could ordered by forward observers or by the infantry themselves. The British developed the "quick barrage", a standardised barrage pattern that could be ordered by radio without advance plotting of the fireplan on a map.^[6]

[edit] Standing and box barrages

A standing barrage was static. A standing barrage might be defensive, to inhibit the movement of enemy troops. A creeping barrage could be made to stand on a static line for a time before it moved on, perhaps waiting for the infantry to form up behind it, or to catch up, or perhaps it would stand on the line of known enemy defences, to do more damage and sap enemy morale.

In a box barrage three or four barrages formed a box – or more often three sides of a box – around a position to isolate it. Standing or box barrages were often used for Defensive Fire tasks, in which the barrage was pre-registered in a position agreed with the defending infantry commander, to be called down in the event of an enemy attack on his positions. A box barrage could also be used to prevent the enemy from reinforcing a position to be attacked. In a trench raid of March 1917, 1st Battalion the Buffs were supported first by a creeping barrage, then by a box barrage once they were in the enemy trenches, to prevent German reinforcement or counterattack, plus dummy bombardments on other sections of the line to confuse the enemy.^[7]

[edit] Advantages and drawbacks

It was soon appreciated how important it was for the attacking troops to follow the barrage closely (leaning on the barrage), without allowing time for the defenders to recover from the shock of bombardment and emerge from their dug-outs; the French reckoned they should be suffering 10% of their casualties from their own artillery if they were close enough to the barrage.^[8] Ideally the attackers should be into the enemy positions before the defenders have time to recover their composure after the terror of an intense bombardment, emerge from shelters and man their firing positions. On the first day of the Somme, and in the later French Nivelle Offensive on the Chemin des Dames, the barrage outpaced the infantry, allowing the defenders to recover and emerge from their dug-outs, with disastrous results for the attackers.^[9] By the end of World War I it was realised that the important effect of the barrage was to demoralise and suppress the enemy, rather than physical destruction; a short, intense bombardment immediately followed by infantry assault was more effective than the weeks of grinding bombardment used in 1916.

A creeping barrage could maintain the element of surprise, with the guns opening fire only shortly before the assault troops moved off. It was useful when enemy positions had not been thoroughly reconnoitered, as it did not depend on identifying individual targets in advance^[10]. On the other hand it was wasteful of ammunition and guns, as much of the fire would inevitably fall on ground containing no enemy.

The World War I barrage with programmed lifts had the effect of confining the infantry advance to the artillery schedule, and of requiring the use of linear tactics, restricting infantry manoeuvre. Infiltration tactics later proved more effective than advancing in rigid lines, and the infiltration phase of German stormtrooper attacks could not use a creeping barrage; but the opening phase of Operation Michael was still supported by a massive creeping barrage, containing a heavy mix of gas shells.^[11] The importance of the barrage was such that traditional infantry tactics, such as reliance on the infantry's own firepower to support its movement, were sometimes forgotten.^[12]

In the featureless Western Desert in World War II, one benefit of the barrage was that it enabled the infantry to conform their line to the barrage, ensuring that their line of advance was correct.^[13]

By 1943 the barrage was considered to dissipate firepower and to constrain the infantry into advancing in rigid lines^[14].

A barrage could severely churn up the ground, especially in soft going, and impede the progress of the attacking troops.^[15]

[edit] World War I

Australian Heavy Artillery capping 8 inch shells with '106' (instantaneous) fuses at Verbranden Road, near Ypres, October 1917.

A creeping barrage was first used in a small section of the line at the battle of Loos, but the infantry did not advance behind it. The first day of the battle of the Somme saw the first large-scale creeping barrage, closely followed by the infantry and intended to keep pace with them. On XV Corps front, the barrage was programmed to lift 50 yards every minute. Unfortunately it did not protect the troops whilst they were crossing No-Man's Land, and along the Somme front it proved impossible for the infantry to keep up with the pace of the barrage.^[16] A creeping barrage became the standard tactic for infantry attacks from September 1916 onward, and soon spread to the French army, enabling the French recapture of Fort Vaux at Verdun in November 1916. By the later stages of the Battle of the Somme, the British had learned the lessons of keeping close to the barrage: the BEF circulated an aerial observer's report commending a "most perfect wall of fire" followed up within 50 yards by the infantry of 50th Division, enabling them to take a village with little opposition. A report said "Experience has shown that it is far better to risk a few casualties from an occasional short round from our own artillery than to suffer the many casualties which occur when the bombardment is not closely followed up".^[17]

At first, British creeping barrages consisted only of shrapnel shells, but an equal mix of HE was soon added, in some cases later supplemented by smoke shells. The creeping barrage would advance at a rate of 100 yards every one to six minutes, depending on terrain and conditions; although six minutes was found to be too slow.^[18]

29th Infantry Battalion, 2nd Canadian Division, advance behind the barrage at the Battle of Vimy Ridge, 9 April 1917.

By the Battle of Arras in 1917 the creeping barrage was huge and complex, with five or six lines of fire covering a depth of 2,000 yards ahead of the infantry. Predicted fire was used, so that the barrage opened without preliminary target registration shots. Back barrages were used, in which rearmost lines of the barrage reversed direction, and machine gun barrages were introduced. False barrages attempted to deceive the enemy about Allied intentions or to force him to reveal his positions.^[19] The creeping barrage was used to great effect in the Canadian success at Vimy Ridge.^[20]

On the Eastern Front, Col Georg Bruchmüller developed a form of double creeping barrage, with the first line of the barrage consisting of gas shells. His ideas were applied in the German Spring Offensive of 1918.^[21]

The day of the lengthy large-scale preliminary barrage had largely passed by the end of World War I, at least in Western nations, with the realisation that best results were achieved by neutralising the enemy rather than attempting his physical destruction, and that short, concentrated bombardments, including creeping barrages, were more effective in neutralising the enemy than extended bombardment. Once open warfare returned after the breaking of the Hindenburg Line in September 1918 the British fired far fewer creeping barrages, using more lifts and concentrations instead.^[22]

Attacks by tanks do not need the same form of artillery support, and the single barrage along the entire front of the advance had even been abandoned by the battle of Cambrai in 1917. More sophisticated fire control enabled infantry to call down artillery fire in direct support, or targeting of identified enemy positions.^[23]

Nevertheless, barrages remained in use. On 31 August 1918 the attack of the US 32nd Division was preceded by a walking barrage. After first passing over the German line, the barrage returned twice more, attempting to catch the defenders returning to their firing positions from their dugouts, or to keep them underground when the real assault went in.^[24]

[edit] World War II

In the West, there would rarely be enough guns to mount a full barrage along the extended front of attacks in armoured warfare of World War II. The barrage did remain in use on a smaller scale. For the opening of the battle of El Alamein, for example, a barrage was considered by Montgomery's planners, but rejected in favour of fierce concentrations on known or suspected targets in turn. Along a 12,000 yard front, 456 guns were considered insufficient for a true creeping barrage (at Neuve Chapelle there had been one gun for every four yards of front).^[25] But creeping and rolling barrages were used in some divisional sectors and in later phases of the Alamein battle. For Operation Supercharge on 1–2 November 1942, the attack in the 2nd New Zealand Division sector was preceded by a creeping barrage of 192 guns along a 4,000 yard front, firing on three lines. There was almost one 25-pounder for every 20 yards of front, plus two medium regiments thickening the barrage^[26].

While artillery tactics had been subjected to considerable evolution between the Wars, the British Gunnery School at Larkhill, and developed the most significant techniques for rapidly controlling and coordinating artillery fire. The impact of this was first felt in the Western Desert campaign. Essentially, in World War One, it became essential to accurately plot the location of all guns, but the British would survey in all their guns to one reference point; making it possible for every artillery piece within range to join a fireplan in a very few minutes (provided they were in communications), rather than over several hours or days.

By the fighting in Tunisia, more guns were available and the defenders were more concentrated than in the Western Desert. The artillery plan for the British attack at Wadi Akarit in April 1943 involved no less than eight barrages in three phases ahead of the advances of 50th and 51st Divisions. They included a standing barrage to mark the start line in the dark and enable the infantry to form up in the right alignment; a barrage that wheeled left during the advance; and an on-call creeping barrage. Nevertheless, attacks rarely relied solely on a barrage for artillery support: at Wadi Akarit pre-arranged concentrations on likely targets were called down by observers in the course of the assault^[27].

Nevertheless, it remained in use in the Italian Campaign. In the assault on the Hitler Line on 23 May 1944, 810 guns were amassed for the attack of Canadian I Corps. Three hundred of them fired on the first line of a 3,200 yard wide barrage, beginning three minutes before the infantry moved off and lifting at a rate of 100 yards in five minutes. It was due to pause for an hour at the first objective, then lift at 100 yards per three minutes to the further objectives, but the timing was disrupted by heavy resistance and defensive artillery fire. The operation was later criticised for concentrating on too narrow a front, constrained by the need for enough guns to produce a dense barrage.^[28]

British 4.5 inch gun in action near Tilly-sur-Seulles, Normandy, 1944.

In the assault crossing of the Senio in 1945, dummy barrages were used to confuse the enemy, either misleading them as to the line of attack or drawing them out of shelters as the barrage passed, expecting an infantry assault, only to catch them with a renewed barrage or air attacks. On Monte Sole, US artillery fired probably its heaviest barrage of the war, 75,000 shells in a half hour to clear the advance of the South Africans.^[29]

In Normandy, a creeping barrage preceded the Canadian and Scottish attacks in Operation Epsom.

For the opening of Operation Veritable, the push to the Rhine, the fire of 1,050 field and heavy guns was supplemented by 850 barrels of pepper-pot barrage: other weapons – mortars, machine guns, tanks, anti-tank guns, anti-aircraft guns and rockets – supplementing the field guns. The true barrage of the British XXX Corps began at 09.20, building in intensity over the next hour, 500 guns shooting at a line 500 yards deep. The barrage included smoke shells to screen the attackers forming up behind the barrage. From 10.30 the barrage was pure high explosive and began to roll forward. A 300 yard lift was made every 12 minutes, the lifts being signalled to the infantry by yellow smoke shells, and the barrage paused for ½ hour at each defensive line. 2,500 shells were fired per km² per hour until the barrage stopped at 16.30.^[30]

The barrage remained in Soviet doctrine in World War II, where the creeping barrage by massed guns was the standard accompaniment to an infantry assault. The Soviet artillery lacked the sophisticated communications nets necessary for more subtle tactics, but had plenty of guns. Some 7,000 guns and mortars were massed for the counterattack at Stalingrad, and huge bombardments remained standard for the rest of the war.^[31]

Illustration of a complex walking barrage, used during defence of Khe Sanh, Vietnam.

[edit] Korean War and after

The barrage continued in use into the Korean War. At the Battle of Pork Chop Hill, UN forces employed on-call, pre-registered defensive fires called flash fire to defend its outposts, in which artillery laid down a box barrage in a horseshoe-shaped pattern around the outpost. It was still in use in the Vietnam War.

In the 1982 Falklands War, the assault of 42 Commando Royal Marines on Mount Harriet was preceded by an accurate walking barrage from supporting artillery, firing some 100 metres ahead of the advancing Marines. Later phases of the attack used a pepperpot barrage, including Milan anti-tank missiles.^[32]

[edit] Use and misuse of the word

The word barrage, imported from the French for "barrier" around 1915, denotes a particular artillery tactic, and has a very specific meaning in military circles.

The word has since entered the language as meaning any intense sequence of words or missiles – eg a barrage of questions. It is frequently misused to describe any form of artillery fire of more than one round: On April 29, 2007, Reuters reported “US Launches Barrage in Southern Baghdad”,^[33] but instead of the mass destruction and casualties one would expect from a barrage in a residential area, it appears that about 24 rounds were fired, probably against point targets.

[edit] Notes

[edit] References

• Hogg, Ian V, Barrage: the Guns in Action, Macdonald, 1971
• Bidwell, Shelford, Artillery Tactics 1939-45, Almark, 1976
• Blackburn George G., The Guns of Normandy, The Guns of Victory, and Where the Hell are the Guns McClellandStewart, 1995-97.
• US Launches Barrage in Southern Baghdad Reuters, 29 April 2007. Example of misuse of term barrage. Retrieved on 24 October 2007.

[edit] External links

• British Artillery in WWII Fire Planning detailed account of barrage techniques on a site devoted to technicalities of British artillery. Retrieved on 19 November 2007.
• Historical Artillery and Mortar Tactics an excellent summary of artillery tactics, mainly WWII, including details of the fire pattern sizes used by different guns and units making up the barrage
• Artillery Terms and Tactics glossary of Vietnam era US artillery terminology
• 2nd New Zealand Divisional Artillery: Planning Supercharge detailed account of a barrage plan
• New York Times extracts 19 July 1918 reporting Pershing's communique including references to several tactical uses of barrages by US and German forces Retrieved on 6 November 2007