An army (from Latin ''arma'' "arms, weapons" via Old French ''armée'', "armed" (feminine)), is a fighting force that fights primarily on land. In the broadest sense, it is the land-based military branch, service branch or armed service of a nation or state. It may also include other branches of the military such as the air force via means of aviation corps. Within a national military force, the word army may also mean a field army.
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