Could you accept things like "Jefferson" and "Roosevelt", instead of having to type their full name? You also misspelled the Philippines. It's also called the Legislative Branch.
1776 is debatable: while the Continental Congress declared its independence in 1776, the revolutionaries did not win their independence until the Battle of Yorktown in 1781 and Great Britain did not formally recognize it until the treaty of Paris in 1783. I'd rephrase the clue. Same for the first Thanksgiving--what you seem to mean is the first national holiday commemorating Thanksgiving. And it would be clearer if the clue for Delaware were first, rather than oldest.
Never refer to Dollar Coins as a buck, could also accept Silver/Golden Dollar.
Marines should be acceptable for Marine Corps