What do Japanese soldiers mean by "killing Gaga"?

In the mine battle, the devil captain shouted "kill to give!" "

Some movies are called "silly Gaga"

On the bright sword, Colonel Yamamoto Yimu shouted in "General Mountain": "Hughes gives it!"

Captain Yamada shouted several times in tunnel warfare. Once he was shot in the ass and shouted "kill it." Another time I attacked Gaojiazhuang, and when I entered the village, I shouted "Rabbits give land-dragons".

It's all homophonic.

It means "attack".