Unusual badge, missile and cannons?
 

Hi,
I’m quite new to collecting military badges and have usually found any of my questions answered by reading through this forum.
But this badge has totally stumped me so I thought I would join up to pick your brains.
Please can you help me identify this badge and any history behind it?

United States Army, Air Defense Artillery officer's collar insignia.

I knew I'd seen the badge design before..... I've had this guidon with streamers for years tucked away in a drawer.
Out of sight, out of mind.........

Battery A, 2nd Battalion, 205th Artillery Regiment. Distinctive Unit Insignia (DUI) below. A National Guard outfit in the State of Washington. Had an Air Defence role but don't seem to exist any longer.

Thanks for that - I have notes printed and also filed on harddrives but as ever not easily accessible at the moment.