August:United States Marines occupy Nicaragua and pacify the populace, ostensibly to quell political unrest in the country. In reality, this is done to intimidate the government and thwart the construction of the Nicaraguan Canal, due to the Panama Canal's creation. The only reason the U.S. government leased the Canal to Nicaragua is to prevent anyone else from building in there.
A mass grave site in Ukraine is established near Kiev, where the Soviet secret police dispose of thousands of executed "enemies of the Soviet state." Yevgeny Borisovitch Volgin is implied to have been involved in the massacre.
The Philosophers are founded. The secret organization originates from a treaty formed at a clandestine gathering of authority figures from America, post-revolutionary Russia, and China, which would later be known as the Wisemen's Committee.
August 23: Italian-born anarchists Nicola Sacco and Bartolomeo Vanzetti are executed in the electric chair. The two were convicted of murdering two men during the armed robbery of a shoe factory in South Braintree, Massachusetts, United States in 1920. It is believed by some that the two men were wrongfully executed. However, they have never been officially exonerated.
May 15:EVA (Tatyana/Tanya/Big Mama) is born in Meridian, Idaho, USA. During childhood, she is taken from her family by the Philosophers and placed in a joint U.S.-Soviet-Chinese facility to be trained as a spy, similar to other children from across the world.
^ abcMetal Gear Solid V: The Phantom Pain, Kojima Productions (2015).
^The Document of Metal Gear Solid 2, Konami Computer Entertainment Japan (2002).
^ abcdefgMetal Gear Solid: Peace Walker, Kojima Productions (2010).
^Metal Gear Solid 3: Snake Eater, Konami Computer Entertainment Japan (2004). The Boss: Early in the twentieth century, the true holders of power in the United States, the Republic of China, and the newly-formed Soviet Union, gathered together in a secret meeting that would later be known as the Wisemen's Committee. The secret pact they formed there marked the beginning of the Philosophers.
^ abcMetal Gear Solid 4 Database, Kojima Productions (2008).
^Metal Gear Solid V: Ground Zeroes, Kojima Productions (2014).
^ abcMetal Gear Saga Vol. 2, Kojima Productions (2008).
^ abMetal Gear Solid 2: Sons of Liberty, Konami Computer Entertainment Japan (2001).
^Metal Gear Solid 4: Guns of the Patriots, Kojima Productions (2008).
^ abcdMetal Gear Solid 3: Snake Eater instruction manual, Konami Computer Entertainment Japan (2004).