From Ohio History Central
→The Progressive Era: 1901-1928
==The Progressive Era: 1901-1928==
*1901: Leon Czolgosz assassinated [[President McKinley]] in Buffalo, New York.
*1902: The [[Ohio General Assembly]] officially adopted [[Ohio's state flag]].
*1903: Ohioans [[Orville]] and [[Wilbur]] Wright complete the first successful flight of a powered airplane.
*1908: Ohioan [[William H. Taft]] elected the 27th President of the United States.
*1908: The [[Collinwood School Fire]], near Cleveland, killed 173 pupils, two teachers, and one firefighter.
*1913: The [[Flood of 1913]] caused the death of at least 428 Ohioans and brought destruction across the state.
*1914-1918: [[World War I]]
**1918: Aproximately 1,200 troops died at [[Camp Sherman]] during the [[Influenza Epidemic of 1918]].
*1920: Ohioan [[Warren G. Harding]] elected the 29th President of the United States.
*1925: The dirigible ''[[Shenandoah ]]''[[crashed]] near Ava, Ohio, killing 14 people.
==The [[Great Depression]] and [[World War II]]: 1929-1945==