Question

In 1874, Lieutenant George Armstrong Custer insisted that the Sioux give up their reservation land in the Black Hills of the Dakotas because American cattle ranchers wanted to expand there. the Union Pacific Railroad wanted to build there. his troops had discovered gold there. the Sioux had been defeated in the battle of Little Bighorn.

Answer 1

Lieutenant George Armstrong Custer insisted that the Sioux give up their reservation land in the Black Hills of the Dakotas because his troops had discovered gold there.

The Black Hills Gold Rush took place in Dakota, wich began in 1874 with the Custer Expedition, said expedition was led by  George Armstrong Custer and a force of 1000 men.