[edit] SHOULDER SLEEVE INSIGNIA.

[edit] Description:

• An equilateral triangle, one point up, above a horizontal tab attached in base, the overall dimensions of triangle and tab is 4 1/16 inches in height and 3 7/8 inches in width.
• The triangle is divided into three sections, the upper section yellow, the dexter section blue and the sinister section red, overall a gun bendwise in front of a tank track and wheels all black surmounted by a red lightning flash bendwise sinister.
• In the apex the Arabic numeral "1" in black, all within a 1/8 inch green border.
• The tab is yellow with a 1/8 inch green border with the inscription "OLD IRONSIDES" in black letters 5/16 inch in height.

[edit] Symbolism:

• Yellow, blue, and red are the colors of the branches from which armored units were formed.
• The tank tread, gun, and lightning flash are symbolic of mobility, power, and speed.
• The division's designation is in Arabic numerals.

[edit] Background:

• The shoulder sleeve insignia was originally approved without the tab on November 22, 1940.

• The tab was authorized as a separate item on February 21, 1956.

• The insignia was changed to a one-piece insignia on November 5, 1970.

This image shows a flag, a coat of arms, a seal or some other official insignia produced by the U.S. Army Institute of Heraldry. It is in the public domain but its use is restricted by Title 18, United States Code, Section 704 and the Code of Federal Regulations (32 CFR, Part 507). Permission to use these images for commercial purposes must be obtained from The Institute of Heraldry prior to their use.

- US Army Institute Of Heraldry