2.  Caused by injustice taxation and use of slaves in the South  Took place from 1840-1880  Had caused many problems; main issue was the use of slaves  Abraham Lincoln denied slavery because it became very unethical

3.  Emancipation Proclamation  January 1, 1863  “Gave all persons held as slaves within any state or designated part of a state, the people where of shall then be in rebellion against the United States shall be then forever free.”  Freed about more than 50,000 slaves  This revolutionized by starting to give slaves rights, and be considered normal citizens

4.  The Airplane was created  1880-1918  Invented by the Wright Brothers  New invention would change transportation and travel in the world

5.  1914-1918  Created the different types of aircrafts Ex: Fighter, bomber, and attack airplane  Permanently changed and revolutionized the tactics and strategies of war

6.  Flight in the air  1914-1918  Each country had a maximum amount of available planes  Aircraft technology started to advance  Created bigger, faster, and more maneuverable planes  This also lead to the creation of the rotary engine  This revolutionized the airplane industry