First Reactor
The first mission of the Rising Sun campaign is easy enough.
Use the sudden transport's ability to look like one of the Bullfrogs in the port. Go past the Tesla coils and use the imperial warriors in the transport to take out the conscripts. Have your co-commander take out the first reactor near the lighthouse.
Second Reactor
When this is done, take your forces to the second reactor. Use your Final Squadron X to take out the Reactor.
Monumental Task
Move into the city, avoiding the Tesla troopers. Head north and take out the barracks along the way to gain access to a group of Shinobi. Use them to take out the Tesla troopers and use your tankbusters to take down the monuments.
Keep your forces together and take the right most bridge when the map expands again, using the shinobi to take out the infantry. Make liberal use of the final squadron power to take out hard targets and the war factory the soviets have near the docks. Take out the reactors by destroying them or using a shinobi. It is easy enough to destroy them, so just take them out. With the Tesla coils down, finish the mission by destroying all the Dreadnoughts in the Harbor and the mission will end.