'Fight' in the Bible

Yahweh your God who goes before you, he will fight for you, according to all that he did for you in Egypt before your eyes,

Then you answered and said to me, "We have sinned against Yahweh, we will go up and fight, according to all that Yahweh our God commanded us." Every man of you put on his weapons of war, and presumed to go up into the hill country.

Yahweh said to me, "Tell them, 'Don't go up, neither fight; for I am not among you; lest you be struck before your enemies.'"

for Yahweh your God is he who goes with you, to fight for you against your enemies, to save you."

When you draw near to a city to fight against it, then proclaim peace to it.