Were there any notably bad groups of fighters in the history of warfare?

by Its_apparent
thefourthchipmunk

Not an expert, but would the Arab forces that attacked Israel in various wars satisfy the prompt? I am thinking war of independence especially.

Same of the polish, French, and then Russian defenses against Hitler. Also I hear the Italians had some pathetic flops in ww2.

How about British v. Chinese in the nineteenth century.

Finally, I remember hearing that the second gulf war was the first military triumph by Spain in several centuries.