Riddles for History Buffs and Time Travelers

I crossed the Rubicon and changed a republic forever. Who am I?

I wrote a diary in hiding and taught the world about hope. Who am I?

I rang in midnight rides shouting warnings on horseback. Who am I?

I painted a ceiling with the stories of creation. Who am I?

I marched with salt in India to change history. Who am I?

I declared that the sun, not Earth, takes center stage. Who am I?

I sparked a revolution with a tea party and a pen. What am I?

I was carved into stone in South Dakota alongside three friends. What am I?

I sailed with three ships and never found India. Who am I?

I’m the document that begins 'We the People.' What am I?

I’m the timeline event when the Berlin Wall fell. What year am I?

I’m the canal that shortened the trip from the Atlantic to the Pacific. What am I?

I’m the nurse nicknamed the 'Lady with the Lamp.' Who am I?

I’m the code-breaker machine that helped end a world war. What am I?

I am the trail that led pioneers westward in covered wagons. What am I?