ETYM German.
(Homonym: core)
Military formation consisting of two to five divisions. Its strength is between 50,000 and 120,000 people. All branches of the army are represented. A corps is commanded by a lieutenant general or, in the US, a three-star general. Two or more corps form an army group.
1. A body of people associated together.
2. An army unit usually consisting of two or more divisions.