The Three-Light Traffic Light, Invented by Garrett Morgan in 1923. With only an elementary school education, black inventor (and son of a slave), Garrett Morgan came up with several significant inventions, including an improved sewing machine and the gas mask.
Answer: When District Commander Gen. Thomas C. Hindman ordered Pike to send troops to Arkansas in May 1862, Pike resigned in protest. He argued that his command should be separate from Hindman's and that his troops should not serve outside Indian Territory.
The aryans stopped being pastoral nomads and became farmers. The creation of the iron plow and the use of irrigation made it possible for them to turn the jungle along the Ganges river into farmland
