corps

noun
1
a large unit of an army, consisting of two or more divisions
لشکر, سپاه
2
one of the groups of an army with a special responsibility
سپاه, لشکر, واحد نظامی
He's in the Royal Army Medical Corps.
the Army Corps of Engineers
3
a group of people involved in a particular job or activity
گروه, هیئت, مجموعه, دسته
a corps of trained and experienced doctors
Local people worked alongside an international corps of volunteers.