Refers in the aggregate to military, naval and air forces of any nation. ——AAT台湾

a large organized group of people trained to fight on land in a war.——朗文当代大辞典

a large number of people involved in the same activity.——朗文当代大辞典

An armed force, on land, sea, or in the air, formed to meet a particular need and often later disbanded; an assemblage of people equipped to fight. Now chiefly hist. or with modifying word.——牛津当代大辞典

An organized body of soldiers trained and equipped to fight on land; a land force.——牛津当代大辞典  @en