I am not in favor of direct involvement but sending aircraft is reasonable and prudent. North Vietnam received billions of direct military equipment aid from the USSR and China during the Vietnam war. East and West have been fighting indirect proxy wars forever. It's what we do.
Say, isn't 'prudent' a George W. Bush word? Is that you Poppy Derp?

#ThousandPointsOfLight
I feel sorry for the people in Ukraine, but their government is rotten thru and thru. I am not at all in favor of aiding their government in any way.
My two cents. Send food and blankets not bullets.