What happened in 1803 that changed the united states

The Louisiana purchase i believe is the answer you're looking for

The Supreme Court of the United States is the highest federal court of the United States. Established pursuant to Article III of the United States Constitution in 1789, it has ultimate (and largely discretionary) appellate jurisdiction over all federal courts and over state court cases involving issues of federal law, plus original jurisdiction over a small range of cases. In the legal system of the United States, the Supreme Court is the final interpreter of federal constitutional law, although it may only act within the context of a case in which it has jurisdiction. The answer is  Louisiana purchase 

Most Honorable Delegates,

I recommend that state leaders replace the Articles of Confederation. We need a new Constitution. I have listed three weaknesses of the Articles of Confederation below. I include an explanation of why each weakness is a problem.

Weakness #1:

Heights

Explanation:

I cant go nowhere that is very high

Weakness #2:

Pork

Explanation:

If i eat pork, i get sick

Weakness #3:

Water

Explanation:

I nearly drowned when i was younger(im 12)

Parts 3

Preamble to the U.S. Constitution

"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defense, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America."

This is how I would rewrite the Preamble so that other people can understand it. I hope it helps increase support for the new Constitution.

My Preamble:

Hello, My name is Cheyenne brown. I am 12 yea. old and live with my family in a house.

Sincerely,

Cheyenne Brown