Depends on how big the group is, I will start with smallest. Squad, Platoon, Company, Battalion, regiment, division
The smallest group is called a fire team which is 4 or 5 soldiers, a normal squad is about 10 soldiers, a platoon is usually 4 squads plus a platoon leader and a platoon sgt, a company usually is made up of at least 4 platoons plus a company commander and a 1st sgt, a battalion is at least three companys. The number of soldiers also mya change upon their primary use, weapons, infantry, MP and such.
they were called monquisitors.]
The southern solders were called rebels.
thespanish soldiers were called conquerors
54th regiment
captain
1,000,000,000,000,000,000,000,000,000,000,000,000
Manual of Arms
according to my point of view i may say the pharonic egypt because in the ancient times the egyptians have a group of solders called the scribes who were train for war.
so it can go to help the wounded and dead solders
A small group of Americans fought with rocks and British solders fought with guns. The British won.
she was called the angel of the battlefield and she helped poor solders that was hurt.
The collective noun for a group of soldiers could be: Platoon of soldiers. Troop of soldiers. Patrol of soldiers. Squad of soldiers.