One thousand Nigerian troops were airlifted into Liberia to end the occupation of Monrovia.
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Spanish conquistador Pedro Arias Dávila founded Panama City.
The Transcontinental Railroad linking up the East and West halves of the US was completed in Colorado.
The Indian Appropriations Act added the sell or starve clause.
Kristofer Helgen announced the discovery of the olinguito, a mammal of the raccoon family Procyonidae.
The world's second oldest theme park, Tivoli Gardens, opened in Copenhagen, Denmark.