three colours

Some wargaming:

The most probable cause of war between RED and BLUE is the constantly increasing BLUE economic penetration into regions formerly dominated by RED trade, to such an extent eventually to menace RED standards of living. The RED race is essentially homogenous, more or less phlegmatic, but determined and persistent when once committed to a policy, and is noted for its ability to fight to a finish.

While CRIMSON provides the RED Empire with advantageous bases at such widely separated points as to invite an initial dispersion of BLUE armed forces, CRIMSON itself occupies an extremely weak position with respect to BLUE. While its territory is of great extent, all well-developed parts thereof lie close to the BLUE border; hence, they are especially vulnerable to attack from BLUE.

The who, where and what are over here.