'War' in the Bible

a time to love and a time to hate; a time [for] war and a time [for] peace.

Just as no one can control the wind to restrain the wind, so also no one can control the day of his death. Just as no one is discharged in time of war, so wickedness will not deliver the wicked.

Wisdom [is] better than weapons of war, but one sinner destroys much good.