What was the cause of Red Cloud’s War? The government broke promises of a treaty with the Sioux.

The government built a trail through Sioux hunting grounds.

US soldiers attacked the Sioux for their land.

Red Cloud's War (also referred to as the Bozeman War or the Powder River War) was an armed conflict between the Lakota, Northern Cheyenne, and Northern Arapaho on one side and the United States in Wyoming and Montana territories from 1866 to 1868. The war was fought over control of the western Powder River Country in present north-central Wyoming. This grassland, rich in buffalo, was traditionally Crow Indian land, but the Lakota had recently taken control.[2] The Crow tribe held the treaty right to the disputed area, according to the major agreement reached at Fort Laramie in 1851. All involved in "Red Cloud's War" were parties in that treaty.[3]

Red Cloud's War

Part of the Sioux Wars

B B B B B B B B B B B B B B B B B B B  B B B B B B B  B B B B B B B B

Explanation:

"the royal proclamation of 1763"

confedracy

supported slavery

upheld the supremacy of federal laws

believed states should be able to nullify federal laws

union

wanted to abolish slavery

supported high tariffs

upheld the supremacy of federal laws