Munich serves as a chaotic introduction to the Scrin's military might. Beating this mission is not difficult at all. Only one of the transports needs to survive to complete the mission, and there is no bonus to saving all of them. You start with an experienced team, including two max-rank pitbulls who will have some fun blowing up Scrin aircraft. To complete this mission, keep your team near the center of the convoy at all times.
Attack move is recommended as you snake your way through the city. Watch for nasty tripods, the Scrin walker unit. When you are getting closer to the bridge, another squad will join you, complete with two engineers to capture the secondary objectives. Join them up with your force and proceed across the bridge, but send one of the speedy engineers to the north to snag the lab. With your force going across the bridge, get the power plant captured as soon as possible to stave the Scrin ground forces. Now it's just a short wait to completion of the mission.