Mier y Terán Report, Fredonian Revolt, Law of 1830

Manuel Mier y Terán joined Mexico's revolutionary army in 1811. He once fought under Augustin Inturbide, the Emporer of Mexico. Emporer Inturbide noticed Mier's natural talents in math and engineering. After he left the revolutionary army in 1821, Emporer Inturbide invited him to become a member of the Mexican Congress in 1822. He accepted and joined the Colonization Commitee of Mexico.

In 1828 is the Fredonian Revolt. Hayden and Ben Edwards, pioneer settlers, lead this rebellion against Mexico. Mexico was concerned that Texas might join the revolt. Therefore, Mexico sent Mier to investigate Texas. He found that the American settlements in Texas were more prosperous than the Mexican settlements, and that the settlements in Texas had stopped following Mexican laws. When he was called back to Mexico his report, known as the Mier y Terán Report, was used by the Mexican Congress to pass the Law of April 16, 1830. This law stated that American immigration is now illegal, that all empresario contracts will be cancelled if not finished, that slavery was illegal (which had become popular in Texas), that more Mexican soldiers and forts would be required in Texas, and that the Mexican government was encouraging European and Mexican immigration.