List of examples of expansionism

The following are examples of modern and past expansionism.

Modern expansionism

European enlargement The expansion of the European Union between 1989 and 2007 (and beyond).
Pakistan and India by having sought (in the recent past) control of Jammu and Kashmir
Afghanistan sought to create an enlarged Greater Afghanistan, specifically to absorb land inhabited by Pashtuns in the North West Frontier Province in modern Pakistan
Greece sought to expand its territory in order to have all Greeks united (Megali Idea) in one country.
Italy (during the rule of Benito Mussolini) sought to enlarge its territory in Europe.
Japan sought to expand to a vast territory of China, Southern Asia, and Asian Pacific during WWII.
Nazi Germany sought to unite all ethnic Germans and take land in the east (see Lebensraum)
USA (see Manifest Destiny) sought to expand into all of Canada during the War of 1812 and later with the Annexation Bill of 1866. Also sought to expand into Mexico, taking what is roughly today's California, Nevada, Utah, Arizona, Texas, and New Mexico.
Europeans sought to expand to around the world with colonialism (see Imperialism)
The Ottoman Empire expanded its territory from Asia in today's Turkey into Africa and Europe from 1453 to 1683.