Advance Wars 1+2: BHR Mission 26

This is one of the annoying missions as the place to repair Drake's stuff is so far away from the objective. What's worse is that unless you expose yourself to enemy fire, you will more often than not chip away at the enemy rather than flat out killing them. This makes it difficult to get a good power score, and I am suspecting you may be better off getting Kanbei to build a Lander and send someone over to destroy the cannons or at least leave the final blow for him so you can get better scoring.