| Events | A or B |
|---|
| (A) Affirmed wins the Triple Crown, (B) Mount St. Helens erupts | |
| (A) Dr. James Naismith invents basketball, (B) Henry Ford founds Ford Motor Company | |
| (A) The first modern Olympic games are held in Athens, (B) Thomas Edison files patent for the lightbulb | |
| (A) Cincinnati Reds are founded, (B) Eiffel Tower is constructed | |
| (A) Cameroon wins Gold medal in football (soccer) at Sydney Olympics, (B) Enron files for Chapter 11 bankruptcy | |
| (A) Spencer Gore wins inaugural Wimbledon Championship, (B) Abraham Lincoln assassinated by John Wilkes Booth | |
| (A) Tom Brady wins his first Super Bowl, (B) The Euro is introduced | |
| (A) First Indianapolis 500 is held, (B) Gavrilo Princip assassinates Archduke Franz Ferdinand | |
| (A) Baltimore Colts defeat New York Giants in 'Greatest Game Ever Played', (B) Jonas Salk develops vaccine for Polio | |
| (A) Muhammad Ali defeats George Foreman by TKO in the 'Rumble in the Jungle', (B) North Vietnamese Army takes Saigon, effectively ending the Vietnam War | |
| (A) First ever night game at Wrigley Field, (B) Challenger Space Shuttle Disaster | |
| (A) U.S. Men's Hockey 'Miracle on Ice', (B) Margaret Thatcher elected Prime Minister | |
| (A) Premier League is founded, (B) Nelson Mandela inaugurated as President | |
| (A) Cincinnati Reds are founded, (B) Eiffel Tower is constructed | |
| (A) Tom Brady wins his first Super Bowl, (B) The Euro is introduced | |
| (A) Spencer Gore wins inaugural Wimbledon Championship, (B) Abraham Lincoln assassinated by John Wilkes Booth | |
| (A) First Indianapolis 500 is held, (B) Gavrilo Princip assassinates Archduke Franz Ferdinand | |
| (A) Affirmed wins the Triple Crown, (B) Mount St. Helens erupts | |
| (A) Johan Cruyff wins his first Ballon d'Or, (B) Apollo 11 lands on the moon | |
| (A) Uruguay wins inaugural World Cup, (B) Adolf Hitler is named Chancellor of Germany | |
| (A) Lance Armstrong is stripped of his Tour de France titles, (B) Michael Jackson is pronounced dead | |
| (A) Dr. James Naismith invents basketball, (B) Henry Ford founds Ford Motor Company | |
| (A) Baltimore Colts defeat New York Giants in 'Greatest Game Ever Played', (B) Jonas Salk develops vaccine for Polio | |
| (A) Cameroon wins Gold medal in football (soccer) at Sydney Olympics, (B) Enron files for Chapter 11 bankruptcy | |
| (A) Jackie Robinson breaks baseball's color barrier, (B) Japan surrenders aboard USS Missouri, ending World War II | |
| (A) The first modern Olympic games are held in Athens, (B) Thomas Edison files patent for the lightbulb | |
| (A) Muhammad Ali defeats George Foreman by TKO in the 'Rumble in the Jungle', (B) North Vietnamese Army takes Saigon, effectively ending the Vietnam War | |
| (A) Tiger Woods wins his first major tournament, The Masters, (B) President Bill Clinton is impeached by the House of Representatives | |
| (A) Cal Ripken Jr. begins streak of 2,632 consecutive games played, (B) Indira Gandhi is assassinated in New Delhi | |
| (A) Detroit Red Wings win their first Stanley Cup, (B) Mickey Mouse makes his official debut in 'Steamboat Willie' | |
