'War' in the Bible

If, then, Satan is at war with himself, how will he keep his kingdom? because you say that I send evil spirits out of men by the help of Beelzebul.

But when one who is stronger makes an attack on him and overcomes him, he takes away his instruments of war, in which he had put his faith, and makes division of his goods.

They will be at war, the father against his son, and the son against his father; mother against daughter, and daughter against mother; mother-in-law against daughter-in-law, and daughter-in-law against mother-in-law.

Or what king, going to war with another king, will not first take thought if he will be strong enough, with ten thousand men, to keep off him who comes against him with twenty thousand?