'War' in the Bible

Only that the generations of the children of Israel might know, to teach them war, at the least such as before knew nothing thereof;

And the Spirit of the LORD came upon him, and he judged Israel, and went out to war: and the LORD delivered Chushanrishathaim king of Mesopotamia into his hand; and his hand prevailed against Chushanrishathaim.

They chose new gods; then was war in the gates: was there a shield or spear seen among forty thousand in Israel?

And it came to pass in process of time, that the children of Ammon made war against Israel.

And it was so, that when the children of Ammon made war against Israel, the elders of Gilead went to fetch Jephthah out of the land of Tob:

Wherefore I have not sinned against thee, but thou doest me wrong to war against me: the LORD the Judge be judge this day between the children of Israel and the children of Ammon.

And there went from thence of the family of the Danites, out of Zorah and out of Eshtaol, six hundred men appointed with weapons of war.

And the six hundred men appointed with their weapons of war, which were of the children of Dan, stood by the entering of the gate.

And the five men that went to spy out the land went up, and came in thither, and took the graven image, and the ephod, and the teraphim, and the molten image: and the priest stood in the entering of the gate with the six hundred men that were appointed with weapons of war.

And the men of Israel, beside Benjamin, were numbered four hundred thousand men that drew sword: all these were men of war.

And it shall be, when their fathers or their brethren come unto us to complain, that we will say unto them, Be favourable unto them for our sakes: because we reserved not to each man his wife in the war: for ye did not give unto them at this time, that ye should be guilty.