Originally posted by nighthidesnot
Good ideas regarding planting forest, and using them for placement of radar towers. Additionally, I like to build forts and barricades on those unused tiles. They become military bases for me: I'll create separate bases for each type of unit, which saves me time and hassle as the game progresses.
Once I've reached modern times, my goal is to have at least 50 mech infantry, modern armor, and radar artillery units (for starters). Should I be attacked, I'm ready with overwhelming force for the counter attack (not to mention being ready for offensive missions).
Another advantage of having these units outside of my cities is they are no longer vulnerable to nuclear attack--they would be if they were stationed inside the city. In all my years of playing Civ, I've never seen a nuclear attack on anything but a city.