It's probaly Battleground 1942, or was it called Battlefield? If not that, then most likely Baldur's Gate.

It's Battlefield. BF1942.

Correct, that is one of the best games online, same as MOHAA-Medal of honor allied assualt and the expansion pack spearhead.

Ummm, isn't there another expansion out called secret weapons, or something along that line, comes in a black box?

Yeah, Secret Weapons of WWII came out last month. Jetpacks, steath bombers, long range tanks, motorcycles. All very good...