Answer:
the one that we mostly know today is the Declaration of Independence.
Most successful and best, announcing that the Thirteen Colonies were no longer a part of the British Empire, but independent sovereign states which formed the United States of America, DOI.
Another one is the continental army
When the Revolutionary War began in April 19, 1775, no colony had an army of its own. Instead, they relied on their militia to counter the British forces.
The last one is Continental
It may not exactly be considered an accomplishment as such, but the introduction of Continental currency, or Continentals as they called it, deserves a mention. It was basically an attempt to raise funds for the army.
I hope this helps!
Comment if you have anymore questions,
thank you.