Answer:
(1860) Southern States secede the Union
( Jul 1st 1862) Congress passes the Pacific Railway Act
(May 20 1862) Congress passes the Homestead Act
(1870s) The National Market moves livestock to East and finished goods to West.
(1883) The institution of the Standard Time Zones
(1865) Thousands of families move to the Great Plains
(1869) Union and Central Pacific Railway lines meet at Promontory Point, UT
Explanation: