5/5 but if your having trouble do this:
Buy Nagasaki (near the bottom left of the island). Get the Graveyard, and attack the neighbouring army when you have your army full of gladiators, archers and skulls. In battle, use the speed strategy and you will (most probably win). You will now have 2 spots for your army and noone can attack your other one.
 "Boost Ball")
 "Z-Rox")
 "Platform Racing 2")
 "Desktop TD Pro")
 "The Generic TD")
 "The Great War of Prefectures")
 "Scribble Online")
 "Make Movement")
 "AS2 Flash - Basic Scripts")
 "Wally The Wall")
 "Help! Our sea level is rising!")
 "The Big Bang Robbery")
 "shortest game ever")
 "fighting game 1v1")