The U.S. Air Force, through actions dictated by the President (who is as fond of abortion as you can get!) drops bombs and incinerates women and children, while occasionally killing a man or two who our government says is a terrorist.  

The Army Air Corps (predecessor of the Air Force) made it's bones in World War II by dropping two atomic bombs on Hiroshima and Nagasaki even though Japan had made attempts to surrender as early as 1943, two years prior to the massacre, wholesale, of women and children.  This is historically verified and likely.  Even if not, incinerating women and children indiscriminately is evil.

Would a young man or woman willingly assenting to join such an organization be participating in the very evil that is the U.S. Air Force?  Sure, if the U.S. was a Traditional Catholic monarchy then an air force wouldn't be evil but a defensive organization but today's military is certainly not that, nor has it ever really been that.  Most, if not all, of our wars are wars based on lies and propagated to bring about our own economic advantage.  

We can't pretend that isn't the case.  

However, would a young man or woman who enlisted be an accomplice to evil?

Perhaps they could work as a dental hygienist?  Yes?  No?  They don't need to join the Air Force to work on teeth.  

A mere paper pusher or desk jockey?  No, they can do that anywhere.

Is joining the U.S. Air Force an overt act of evil?