Here are five facts you may not know about doughnuts. Hanson Gregory made the first doughnut hole when he spiked one of his mother's doughnuts on a spoke of his ship's wheel. During World War I, Salvation Army volunteers served doughnuts to soldiers on the frontlines, cementing the snack's image as a wholesome slice of home. The same thing happened during World War II, and many a returning veteran opened up a doughnut shop. The \"Hot Doughnuts Now\" light (which lets customers know when a warm batch of doughnuts is ready) was turned on in 1992.