Charles Poston’s butte burial site the southern area choose to join the Confederacy? What did they have to gain? Why did they not join the Union instead? Write a brief essay on how part of Arizona came to be part of the Confederacy. Reading and Writing Connection with Arizona’s History Read the story of Lieutenant Amiel W. Whipple found below. When you complete your reading, identify the main idea of the story and two examples of supporting details. Lieutenant Amiel W. Whipple Amiel Weeks Whipple (1818–May 7, 1863) was born in Greenwich, Massachusetts. He became a teacher in Concord, Massachusetts in 1834. In 1841 he graduated from the United States Military Academy. He soon was assigned to the United States Corps of Topographical Engineers. In 1851 he was assigned to find the best railroad route across the American Southwest to California. He succeeded in this job and today the railroad that runs across northern Arizona, along the 35th parallel, follows the route laid out by Lieutenant Whipple. When the Civil War started, Lieutenant Amiel Whipple took command as a Captain in the Union Army. He fought at the Battle of Bull Run in 1861. He was promoted to a brigadier-general in 1862, but was killed at the Battle of Chancellorsville in May 1863. In honor of this highly decorated and brave soldier, a new fort in the Territory of Arizona was named after him in 1864. Fort Whipple, located near today’s Prescott, Arizona was the first Territorial Capital of Arizona. Chapter 7 • Review Activities 81