1) The assassination of Archduke Franz Ferdinand of Austria in 1914 triggered the start of World War I.

2) The New England Patriots and the Pittsburgh Steelers hold the record for the most Super Bowl wins, with six championships each.

3) The Industrial Revolution, which began in the 18th century, brought about significant changes in agriculture, manufacturing, mining, and transportation.

4) The American Civil Rights Movement, led by figures like Martin Luther King Jr., fought for equal rights and helped bring about significant social and legislative changes.