Abstract: The variations of side force Cx vs angles of attack a on the wing-body combination and wing-body-vertical tail combination are similar to that on the body alone at high angles of attack with zero side-slip. They are also similar to that of Cz vs a on the wing-body combination at high angles of attack with-8°<β<8°. Three kinds of strakes arc found to be highly effective on alleviating asymmetric vertices, as well as induced side forces on the body, wing-body-vertical tail combinations with zero side-slip and high angles of attack.