I have fixed my problem. I cleaned out some programs that had snuck into my start up. That has fixed the memory leak or whatever problem I was having. Now scenario Bass Drum runs very well. Thanks for the tips.

I will investigate and report back.

I have nearly identical specs as your Lenovo and Operation Brass Drum performance gradually degrades as the game progresses and becomes nearly unplayable after about 10 game time hours.

Thanks guys, I will try your ideas.

I'm playing wargasm scenario. When I preform a low altitude nuke bomb drop the aircraft is destroyed in the blast. I think in real life there is a fuse delay that allows the aircraft to escape. Am I missing something?

No. I've replayed Wargasm scenario on CMO and AGM-28s launch OK.

FWIW, I've noticed same issue.