| Hint | Answer | % Correct |
|---|---|---|
| Turkish empire that conquered Constantinople | Ottoman Empire | 97%
|
| Greek athletic competition that started in 776 BC | Olympics | 95%
|
| Drug that led to two wars in China | Opium | 89%
|
| Cromwell's first name | Oliver | 81%
|
| One of two epics attributed to Homer | Odyssey | 73%
|
| "Father" of the A-bomb | J. Robert Oppenheimer | 66%
|
| Japanese island which was the site of bitter fighting in WWII | Okinawa | 66%
|
| Deadliest D-Day beach | Omaha Beach | 63%
|
| Pioneer trail from Missouri to the Willamette Valley | {Oregon} Trail | 60%
|
| City which Joan of Arc helped free from a siege | Orléans | 59%
|
| Title held by the heir to theDutch throne | Prince/Princessof {Orange} | 59%
|
| Language in which "Beowulf" was written | {Old} {English} | 56%
|
| Also known as the Bolshevik Revolution | {October} Revolution | 52%
|
| Cartel that declared an oil embargo in 1973 | OPEC | 46%
|
| Jacqueline Bouvier's second husband | Aristotle Onassis | 44%
|
| Roman poet who wrote "Metamorphoses" | Ovid | 40%
|
| Site of a "land rush" in 1889 | Oklahoma | 39%
|
| Site of 1993 Israel/PLO accords | Oslo | 34%
|
| Ancient Mexican civilization known for colossal head sculptures | Olmec | 29%
|
| Relatives of the Visigoths | Ostrogoths | 29%
|