This organization was formed to reclaim land stolen from Mexicans during the westward movement of the US government.?

The organization you're referring to is likely the "Mexican American Legal Defense and Educational Fund" (MALDEF) or similar advocacy groups that focus on reclaiming land and rights for Mexican Americans. These organizations aim to address historical injustices and advocate for the rights of Mexican Americans, particularly regarding land claims and cultural heritage. They work to promote social justice, civil rights, and equitable treatment for the Mexican American community.