As a christian,would you go to war?

I think those obedient to God and is son Jesus should not go to war because that will be a show of disobedience.The Bible says that Gods' servants would" beat their swords into plowshares " and not "learn war anymore".Also,to show that his followers would not take up weapons of warfare Jesus said to Peter," return your sword to its place,for all who take the sword will perish by the sword".Jesus also commanded his disciples to love one another (John 13:34,35).They would thus form a international union where no member would ever wage war against his sister or brother.That makes me conclude that Christians should not go to war even for their country. Can you go to war as a christian? And why?