What did Houston and Lamar do to change the history in the republic of Texas?

Sam Houston and Mirabeau B. Lamar played pivotal roles in shaping the Republic of Texas. Houston, as the first president, focused on stabilizing the new nation, advocating for annexation to the United States and promoting peace with Native Americans. In contrast, Lamar, who succeeded Houston, emphasized expansionist policies and military action against Native tribes, which led to significant changes in Texas's territorial boundaries and relations. Their differing visions set the foundation for Texas's future, influencing its eventual statehood and identity.