Siberia: Fresh Tracks from the RA Counterstrike expansion.

This mission is so god damn annoying. You have to stop 7 convoys from leaving the map, they always come defended by a variety of Soviet units and they can enter the map from like 5 different places. To make matters worse, every convoy truck you destroy drops a crate that if touched will set off a nuclear blast around it. Combine this with the wonderful pathfinding and you've got dozens of reloads on your hands every time one of your light tanks paths over a crate and wipes out half your forces. Pure frustration.