[Answer] The Manhattan Project was responsible for what military innovation?

Step 1 : Introduction to the question "The Manhattan Project was responsible for what military innovation?"

...The Manhattan Project is the most important — and arguably the most secretive — military project in U.S. history. From 1942 to 1945, government scientists led by J. Robert Oppenheimer developed the world’s first atomic bomb. The first detonation occurred on July 16, 1945, at the White Sands Missile Range in New Mexico. Within a month, the U.S. used the weapon against Japan in an effort to end World War II.

[Answer] What country was the first to use camouflage specialists in the army?

Step 1 : Introduction to the question "What country was the first to use camouflage specialists in the army?"

...Facing the threat of aerial attacks during WWI, the French army employed camouflage specialists, or "camoufleurs," to disguise targets and equipment. Camoufleurs painted buildings and covered equipment in netting woven with leaves. In time, these efforts became more elaborate: Soldiers were concealed inside hollow fake trees, and uniforms changed from bold and bright to subdued and stealthy.

[Answer] Where was gunpowder invented?

Step 1 : Introduction to the question "Where was gunpowder invented?"

...According to 9th-century Taoist texts, gunpowder was most likely developed in China as an accidental byproduct of experiments looking to create the elixir of life. Gunpowder would slowly make its way onto the battlefield in the 10th century with its use for fire arrows before eventually being used as a weapon in bombs, fire lances, and guns.

[Answer] What fashion accessory was originally designed for Air Corps pilots?

Step 1 : Introduction to the question "What fashion accessory was originally designed for Air Corps pilots?"

...In 1929, the U.S. Army Air Corps contracted Bausch & Lomb to develop glasses that would block the sun from pilots’ eyes during flight. The aviator-style goggles they created are known for their signature convex shape that cover the eye’s entire field of vision. In 1937, the company rebranded a version of aviator sunglasses as Ray-Bans and sold them to civilians.

[Answer] What popular off-road vehicle was first made for military reconnaissance?

Step 1 : Introduction to the question "What popular off-road vehicle was first made for military reconnaissance?"

...During World War II, the American Bantam Car Company developed the Jeep for the U.S. Army, which requested a lightweight, fast, four-wheel drive vehicle for reconnaissance. The Jeep, a nickname for the General Purpose vehicle, was used throughout the war and became key to the Allied victory. Surplus Jeeps were sold to the public after the war and production continued due to its popularity.