This is simply an invasion map simulating the movie Zulu. Invasions of spearmen grow progressively larger until a maxmimum of 600 spearmen attack in the 12th invasion. I completed this on Hard difficulty level, but it may not be as difficult as is sorta fun. If you make it to the last invasion, you probably will have it wrapped up. One word of warning... keep at least one or two woodcutter posts inside your outpost. If you run out of wood, you're dead.