On the first mission, there will be a few men of your own fighting against the tan army. first run up and grab the first three grenades, you'll need them later. Kill all about 5 tan men and quickliy move up where there are 2 to 3 tan men. Kill those three and run up to a fence up ahead. throw your first grenade to spare some of your mens life. Then after killing about 2 men with your grenade, there will be at least 6 guys at defeat them all to move yourself up on the plank beside the tan train. the first part "a" is finished.
The second part of the first mission is to try to somehow stop the tan train. first kill all the guys ahead of you. at the last of when your going to stop, there will be at least 2 to 3 guys. go down and there will be at least another three men, kill them and there will be one guy protecting a tnt for you to destroy the the bridge. After beating the second of the mission.
The last part is making your way up to the train, watch out for surprise attacks and hidden guys waiting for you to come up. when after defeating many men, go behind some trees and start firing straight giving a less harder try going in front of a tank car with many bazooka tan men being there. after destroying the tank car, you have beaten the first mission.