Who was Tecumseh?

He was a Native American leader of the Shawnee and he sided with British.

What was written during one of the battles during the War of 1812?

We have met the enemy and they are ours.

Correct?

Your first answer is right.

Although your second answer is correct, there's a very famous song written during one of the battles.

Both are correct?

Your teacher is probably looking for the song written during an 1812 battle.

http://www.si.edu/Encyclopedia_SI/nmah/starflag.htm

Yes, that is correct. The statement "We have met the enemy and they are ours" was written by Oliver Hazard Perry during the War of 1812. He wrote this statement in a letter to General William Henry Harrison after the Battle of Lake Erie in 1813. To find this information, you can search for "famous quotes from the War of 1812" or "Oliver Hazard Perry Battle of Lake Erie quote."