The "evil eyes" of HMM-163:  One squadron, HMM-163, painted "evil eyes" on the front  of each of their H-34 helicopters.  Some sage claimed that they would scare the superstitious North Vietnamese Army soldiers.  Maybe they did, maybe they didn't.   In any event the "evil eyes" became an HMM-163 tradition.  Over 35 years later, HMM-163 still has evil eyes on the front of their helicopters (although today the helicopters are H-46s, not the older H-34s).