IN is one of the abbreviated forms of "infantry". It may have other meanings, as well... you'd have to state the context in which you've seen it used in order to narrow it down.
not good for the army .
not good for the army .
Private is the lowest rank in the Army
It depends which army you mean
If you mean the ground forces, the Canadian Army, if you mean as a whole, the Canadian Forces.
A legatus or legate was a General in the Roman army.
It depends which army you mean
Army inspection
Situation
Privet.
If you mean least capable, that would be the army of Haiti. If you mean with the least operatives or manpower, that would be Costa Rica, which doesn't even have a standing army.
The Union Army was the Northern army during the American Civil War. The Union Army fought and defeated the Confederate States (Southern) Army in 1865.