Thanks a lot for taking the time to do that! I’ve already learned a few things just from looking at your file!
Here is my updated file: https://dl.dropboxusercontent.com/u/48316829/Type%2095%20copy.blend
But there are a few issues that arise now: When I set the plane to animated passive to stop it from falling, the blocks in the wall begin to separate as soon the animation starts. I want the wall to be solid and then separate as soon as the tank hits the wall. I don’t think I had this problem initially. Is there a way to prevent that from happening until the moment of impact with key framing?
Also, some of the blocks fall through my tank. I take it the solution is just to parent more simulation objects or make the simulation object larger/tank shaped etc. My only question would be why not then just add rigid body to the main body of the tank?