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What were the units who fought in WW2

A historically accurate overview

World War II
Allied Unit Histories

Based on official US, British and Canadian sources

The units of WW2

Which units fought during WW2

The following combat chronicles, current as of October 1948, are reproduced from The Army Almanac: A Book of Facts Concerning the Army of the United States. Where applicable, information is used with permission from the U.S. Army Center of Military History and supplemented by additional official sources.

This is a feature on the website and remains a work in progress. Additional units, including both US, British and Canadian formations, will be added over time.

Last updated: April 2026: updated with new commanding officer profiles, UI design improvements and more structural data.