April 22

Saturday 22, 2000:

The Big Number Change takes place in the United Kingdom.

Thursday 22, 1954:

Red Scare: Army-McCarthy Hearings begin.

Thursday 22, 1915:

The use of poison gas in World War I escalates when chlorine gas is released as a chemical weapon in the Second Battle of Ypres.

Wednesday 22, 1863:

American Civil War: Grierson's Raid begins – troops under Union Colonel Benjamin Grierson attack central Mississippi.

Friday 22, 1836:

Texas Revolution: A day after the Battle of San Jacinto forces under Texas General Sam Houston capture Mexican General Antonio López de Santa Anna.