noun
human wave attack; human wave tactics
Military term for overwhelming an enemy with sheer numbers of soldiers.
その戦闘では人海戦術が用いられた。
Human wave tactics were used in that battle.
noun
throwing people at a problem
Figurative extension: solving a problem by assigning a large number of people to it, often with a negative connotation of brute force rather than efficiency.
人手不足を人海戦術で乗り切ろうとした。
They tried to overcome the labor shortage by throwing people at the problem.