Whether it's salt tossed over the shoulder after the shaker is spilled or not walking under a ladder, most superstitions are pretty harmless. But sometimes superstitions cause Communist rebels to abandon their camp or a revered Navy admiral to refuse to sail.
Here are 6 stories of wartime decisions that hinged on superstition:
1. Rudolph Hess's failed diplomatic mission to England happened after a series of dreams.
Task Force 16 during battle in 1942. Photo: US Navy
Adm. William Halsey Jr. was an ensign on the USS Missouri on April 13, 1904 when an accidental fire burned and suffocated 31 men to death. After that, he was very superstitious about the number 13.
So, when he was assigned commander of the new Task Force 13 that was set to sail on Friday, February 13, Halsey sent one of his officers to protest. The command relented and changed the task force designation to 16 while promising that an oiler would be late, delaying TF 16's departure until Feb. 14.