Definition of trooped:
(n) :
(chiefly in the plural) A group of soldiers; military forces.
(n) :
(collective) A collection of people; a number; a multitude (in general).
(n) :
(military) A small unit of cavalry or armour commanded by a captain, corresponding to a platoon or company of infantry.
(n) :
A detachment of soldiers or police, especially horse artillery, armour, or state troopers.
(n) :
(nonstandard) An individual soldier or member of a military force; a trooper.
(v) :
To move in numbers; to come or gather in crowds or troops.