Our unique geographical position give us the ability to choose every side or to be neutral. Vasall has to choose one side. Masters has to choose own interests.
Bridges in general we have. Of course, not the biggest ones. Nobody want to see our tanks fallen into a river, lakes because of weak bridges. Or to heavy tanks. +70t is a heavy number.
Iran, Russia, Greecd, Egypt, Israel...maybe none of them are a match for us. But together they can create big problems. Even they are not acting together.