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What Happened Today in History on October 18

Explore the historical events that shaped our world on October 18th. From major milestones to cultural achievements, see what happened on this day in history. Dates for earlier events may be approximate.

Circa 1000 CE

Estimated date of Vikings led by the Norse explorer Leif Erikson, landing in North America in present-day Canada.

The Treaty of Vervins is signed, ending the war between Spain and France.

France's King Louis XIV suspends the Edict of Nantes, revoking the religious rights of Huguenots.

The Mason-Dixon Line survey is officially completed. The historic border survey was undertaken by surveyors Charles Mason and Jeremiah Dixon between 1763 and 1767 to resolve a land dispute between the colonies of Pennsylvania and Maryland and Delaware. This line also became a symbolic boundary between the Northern and Southern states in the era before the American Civil War. 

During the Second Opium War, The British High Commissioner to China, James Bruce, 8th Earl of Elgin, orders the complete destruction of the Old Summer Palace in retaliation for the imprisonment and torture of several Anglo-French delegation members by the Qing government, with several of them being killed. 

The United States formally takes possession of Alaska from Russia in a ceremony known as the Alaska Purchase. The $7.2 million purchase, ended Russia’s presence in North America and ensured U.S. access to the Pacific northern rim. 

The last Spanish troops in Puerto Rico sail back to Spain and the US flag is raised in most public buildings on the island formalizing U.S. control of the former Spanish colony. A military government was established under the command of General John R. Brooke. 

Notorious American gangster Al Capone is convicted of federal income-tax evasion. He was subsequently sentenced to 11 years in federal prison and was later transferred to the high-security Alcatraz prison. He was released early in 1939 due to health issues, including advanced syphilis. He died in 1947, suffering from the effects of his illness. More

The Clean Water Act is established as the Federal Water Pollution Control Act of 1948 undergoes sweeping amendments in 1972. The amended law became commonly known as the Clean Water Act (CWA). More

The Hungarian Republic is officially declared, marking the end of Communist rule. More

Protests erupt in Nigeria against police brutality and the Special Anti-Robbery Squad (SARS), leading to widespread demonstrations.