The company's first big customer was the U.S. Army, which saw the invention as a way to allow soldiers to carry chocolate in tropical climates without it melting. During World War II, the candies were exclusively sold to the military. The resulting demand for the candies caused an increase in production and the company moved its factory to bigger quarters at 200 North 12th Street in Newark, New Jersey, where it remained until 1958 when it moved to a bigger factory at Hackettstown. A second factory was opened in Cleveland, Tennessee, in 1978. Today, about half of the production of M&M’s occurs at the New Jersey factory, and half at the Tennessee factory.