Going to try and explain this sans pictures, but it works well.
The road leading north from your HQ branches off in two directions.
One leads offmap to the north, while the other leads to a backdoor entrance behind the Abbey. However, where both roads fork off from each other there is another area beteen the two roads taht appears to dead end just west of Northern Axis HQ. However, tanks and units can actually squeeze through the area and flank the northern HQ without ever having to hit or clear a single mine, thereby destroying one half of you opposition in the first 3 minutes.