[Flyboy]

There are SEALs in the US Marine OOB. There are Rangers in the US Army OOB. That's it.

I've often thought it's an oversight not to include Green Berets or even Delta.

There are SAS and SBS in the British OOB, SAS in the Aussie, Spetsnaz in the Russian etc.

I suppose if you were determined to have units identified as Special Forces you could buy them as 'captured' from the Canadian OOB. Their kit would be pretty similar I suspect, at least where the game is concerned.