In history there have been times when fighting for a good cause like WWII, where the enemy was clearly defined, innocent people suffered, many died, killing or giving up your own life to for world to be a better place for us, then yes if there was another war like WWII I would join the military in a heartbeat.
question to all of you, if someone was breaking into your house and threaten to kill your family would you kill them? would you die for them? Yes I would.