21st Army may refer to:
- 21st Army (Wehrmacht)
- 21st Army (Soviet Union)
- Twenty-First Army (Japan)
- 21st Army Group, Britain
- 21st Group Army, China
This disambiguation page lists articles about military units and formations which are associated with the same title.
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If an internal link referred you to this page, you may wish to change the link to point directly to the intended article.
