What document is this proclamation, written in 1836, a part of?

The Texas Declaration of Independence was the formal declaration of independence of the Republic of Texas from Mexico in the Texas Revolution. It was adopted at the Convention of 1836 at Washington-on-the-Brazos on March 2, 1836, and was formally signed the next day after mistakes were noted in the text.

Cbecause it’s c and this needs to be 20 characters long