How does the moon factor into fortifying position?
Assuming you control the necessary Space Stations and Lunar landing sites, the moon is just another territory along the route. For example, assume that you have Space Stations at Siberia and Mexico, and you control the Tycho Lunar landing site. You could, in a single free move, send MODs from Alden to Siberia, from there to Tycho, from Tycho down to Mexico, and then to American Republic (or further). This same thing can also be done with a Space Station as the transit point between two Lunar landing sites (for example, Tycho — Siberia — Bay of Dew). Controlling a Lunar landing site gives your MODs global mobility.