Yep, Military traffic and airbases for just about every airforce and navy in the world!

If you ask in the AI section at the top, I know for a fact Kevin Jarvis, (who works for or runs the site) will answer ANY and EVERY question you have on it.
The skies are not complete until you pass a few raptors and f-15s during your flight! They also have Transports, cargo, fighters,bombers, apache helicopters, refuelers you name it! And as I said, their work is top notch!
Google MAIW and check out their site! Very friendly forums there too if you need any help.
And they have a nice map feature for choosing which part of the world you want to download packages for. I believe WOAI just added a similar feature.
But if you want Soviet military and civil traffic the ONLY place to get it is Avsim.rus. It's a Russian site, but has an english translated version accesed by a button at the top right of the page, and I'm 99% sure that it is NOT associated with the other 'A' site.

They have EVERYTHING Russian there, including some of the BEST freeware airports and sceneries you'll find anywhere!