Biblical wars are, in every case, started by humans and God's intervention is always to hasten the end of that war.
Did you skip Joshua, chapter one, where God speaks directly to Joshua, telling him to take the Israelites across the Jordan to the land he has promised them? Land already settled, populated, with city after city that he directs them to war on? In chapter 6, God yaps again, in person, to Joshua, telling him exactly how to break into Jericho. Just before the walls fall, Joshua tells his followers, "Shout, for God has given you this city." Then they kill every single Jericho-ite, even the babies, kids, mall brats, oldsters, donkeys, all at sword point. Followed by even bloodier and more depraved events in the remaining 18 chapters. God directs his chosen people to commit acts which would debauch any human being from any time in history. (They do let a prostitute and her family live, because they were traitors to Jericho. So there's that.)
Great story, great faith, something to teach the kids at Sunday school.