Final answer:
On April 6, 1830, Mexico, aiming to maintain control over Texas, outlawed slavery as it was economically significant in Texas and was used to lessen the influence of American settlers there.
Step-by-step explanation:
The Outlawing of Slavery in Mexico
In an attempt to maintain control of Texas and weaken the influence of American settlers, Mexico took several actions. On April 6, 1830, slavery was outlawed by Mexico, specifically targeting Texas where slavery was economically significant. This measure by President Vicente Guerrero intended to diminish the power of the Texans, alongside efforts to encourage Mexican immigration and restrain American immigration into Texas. Despite these attempts, none were successful and instead fueled the Texan and American expansionists' resolve. They continued to call for the incorporation of Texas into the United States, as many settlers already harbored the intention of Texas eventually joining the United States.