The articles of confederation was the first form of government in the united states.
The term "Trail of Tears" refers to the difficult journeys that the Five Civilized Tribes took during their forced removal from the southeast during the 1830s and 1840s. The Cherokee, Creek, Choctaw, Chickasaw, and Seminole were all marched out of their ancestral lands to Indian Territory, or present Oklahoma.
Generally speaking, the chief executive is a member of the legislative branch in a "unitary form of government", since in this government there is only a single governing body.