lots of red lights

I was on my porch when I noticed red lights that seemed to be rising over the trees in the distance.  If 12 o'clock is north they were rising at about 3:15.  They just kept floating up into the sky and proceeded to travel east.  There were about 20 or more red lights floating up like bubbles in soda.  
I live on a path route to the airport in town and the first couple looked like they were flying close that is what caught my eye.  Then they all seemed to rise and head east.  
This continued till 10:22pm and a few stragglers all going the same direction.  It was very eerie like, almost invasion style, like you see in the movies all at once.  Close together.  
I did not hear any sounds, but this was so unnatural.
((ADDENDUM FROM WITNESS))
My previous report was a military exercise.
I had filed a report the night before but have recently found out that the event was a  military exercise of a new type of plane that hovers.  They must have a lot of them because there were 16+.  I am sorry to take up your time.
((END ADDENDUM))
We are grateful for the report and the follow-up addendum, but we are unaware of any military aircraft that are able to hover motionless for 20 minutes, and do so silently.  PD