If you wait til you are attacked, you may not be trained or ready enough to actually defend your country from the attack. You can still join in times of peace with intentions of defense for the future, helping with disaster relief, and providing international aid.
See, that’s an easy question to answer: Did you, or whoever, join the military while the US, or your country, was being attacked?
If you wait til you are attacked, you may not be trained or ready enough to actually defend your country from the attack. You can still join in times of peace with intentions of defense for the future, helping with disaster relief, and providing international aid.
Joining to support the aggressor makes you the aggressor.