Help for Newbies?

[Peef]

I am a wargame newbie, and have recently enjoyed playing SPMBT. Great game! But I keep getting creamed... Part of the problem is that I haven't a clue what units to use where. I see the units have names with lots of numbers and letters that I don't understand (what is an M240 MMG sec, anyway?). I am not familiar with actual military jargon.

Is there a chart (perhaps html or pdf) that lists all of the unit types, along with their best application? Or maybe a strategy guide?

Thanks