Mech Commander is a very hard game, however because of the strategy involved completing it can be made significantly easier with a little help ;-). If you want any other walkthroughs (one's I've found on the web check the FAQ section. The first few are pretty detailed and show exactly where to stand etc... later on I wont bother, I will assume that you know general tactics such as "take the armored car out with the PPC" etc... or I will expect you to experiment and find out yourself!

If you have the chance, read through the strategy section, a lot of it is a bit tedious to be honest, but I think I've put some valuable stuff in there (assuming people don't already know it). 

Operation 1

Mission 1

Links:

Cheat Masters Cheats - http://cheatmasterscheats.tripod.com/cheats/m/mech1.htm