Red alert 2 mission 2008 Olympic dream, why is the second level understaffed?

There's no need to fight. As soon as your engineer went in, a spaceship appeared overhead and a bomb was deployed to blow up your garage, so you couldn't build a tank. Nail house can't fight the last mission without V3, and there are no planes and tanks, and soldiers can't get on it. There is no way to get through customs.