President John F. Kennedy is assassinated in Dallas, Texas, a significant event that impacted U.S. politics and the Cold War era.
The Partial Nuclear Test Ban Treaty is signed by the United States, the United Kingdom, and the Soviet Union, prohibiting nuclear weapon tests in the atmosphere, outer space, and under water.
Charles Xavier and Erik Lehnsherr meet as young mutants and discover their powers and shared vision for mutant-human relations.
Erik Lehnsherr experiences the loss of his mother in a Nazi concentration camp, fueling his anger towards humans and shaping his worldview.
Charles Xavier and Erik Lehnsherr begin recruiting young mutants, including Hank McCoy, Sean Cassidy, and others, to form the first X-Men team.
The team uncovers Sebastian Shaw's plan to start a nuclear war between the US and the Soviet Union using mutant powers.
Xavier and Erik lead the team in an operation to stop Shaw from detonating nuclear weapons, preventing global catastrophe.
Erik and Charles disagree on philosophy and methods, leading to their eventual split and the formation of opposing mutant factions.
