4210 IF ARMY.LOC(X,3) = 1 THEN LET P.COLOR = RED ELSE LET P.COLOR = BLUE
4220 LET H.CORD = ARMY.LOC(X,1)
4230 LET V.CORD = ARMY.LOC(X,2)
4240 IF P.COLOR = BLUE THEN LET TERRAIN$(H.CORD,V.CORD) = TERRAIN$(H.CORD,V.CORD) + "U" ELSE LET TERRAIN$(H.CORD,V.CORD) = TERRAIN$(H.CORD,V.CORD) + "R"