How did army ants get their name?

Answer 1

The word "army" is related to "arm" in the sense of a weapon. In Latin, "armata" means an armed group. It appeared in French as "armée" and then in English as "army" in the 14th century. The specific meaning of a land military force (as opposed to navy) is from the 18th century.

Answer 2

Army ants were named Army Ants by scientists because they are regimented (disciplined) and move, attack, and destroy (kill and consume) as an Army.

Answer 3

They were originally a unit that did landings and other marine-based attacks.