The first chocolate ration bar commissioned by the United States Army was the Field Ration D or Ration, Type D, commonly known as the "D ration."
Army Quartermaster Colonel Paul Logan approached Hershey's Chocolate in April 1937, and met with William Murrie, the company president, and Sam Hinkle, the chief
chemist.
Milton Hershey was interested in the project when he was informed of the proposal, and the meeting began the first experimental production of the D ration bar. Colonel Logan had four requirements for the D ration bar, dictating that it had to: • Weigh 4 ounces (113 grams) • Be high in
food energy value • Be able to withstand high temperatures • Taste "a little better than a
boiled potato" (to keep soldiers from eating their emergency rations in non-emergency situations) Its ingredients were chocolate, sugar,
oatmeal,
cacao fat,
skim milk powder, and
artificial flavoring, fortified with
vitamin B1 to prevent
beriberi. Chocolate manufacturing equipment was assembled to move the flowing mixture of liquid chocolate and oat flour into preset molds. However, it was found that the temperature-resistant formula became a gooey paste that would not flow at any temperature. Hinkle was forced to develop entirely new production methods to produce the bars. Each four-ounce portion had to be kneaded, weighed, and pressed into a mold by hand. The end result was an extremely hard block of dark brown chocolate that would crumble with some effort and was heat-resistant to . The resultant bar was wrapped in aluminum foil and placed in a cardboard carton. Three bars made up a daily ration and was intended to furnish the individual combat soldier with the minimum sustenance recommended each day. Logan was pleased with the first small batch of samples. In June 1937, the
United States Army ordered 90,000 "Logan Bars" and field tested them at bases in the
Philippines,
Panama, on the
Texas border, and at other bases throughout the
United States. Some of the bars even found their way into the supplies for Admiral
Richard E. Byrd's third Antarctic expedition. These field tests were successful, and the Army began making irregular orders for the bars. After the
attack on Pearl Harbor, the bars were ordered to be packaged to make them
poison gas-proof. The bars' boxes were covered with an anti-gas coating and were packed 12 to a cardboard carton, which was also coated. These cartons were packed 12 to a wooden crate, for a total of 144 bars to a crate. After US entry into the Second World War, Congress planned to shut down the candy industry for the duration of the conflict, deeming it non-essential.
Milton Hershey, fighting off attempts to ration sugar, corn syrup, and cocoa, claimed to Congress that chocolate was a vital source of nutrition for the nation's troops. During the war years, the bulk of the Hershey Food Corporation's chocolate production was for the military. Between 1940 and 1945, an estimated three billion units of the specially formulated candy bars were distributed to soldiers around the world." The D ration was almost universally detested for its
bitter taste by US troops, and was often discarded instead of consumed when issued. Troops called the D ration "Hitler's Secret Weapon" for its effect on soldiers' intestinal tracts. It could not be eaten at all by soldiers with poor
dentition, and even those with good teeth often found it necessary to first shave slices off the bar with a knife before consuming. ==Tropical Bar==