Albert Martin was a Texian merchant and captain of the Gonzales Mounted Rangers who delivered William B. Travis' letter "To the People of Texas & All Americans in the World" and died while defending the Alamo garrison. He is a member of the Old Eighteen and Immortal 32.

The Immortal 32 was a relief force of thirty-two Texian Militia from the Gonzales Ranger Company who reinforced the Texians under siege at the Alamo. They are "immortalized" as the only unit to answer the To the People of Texas & All Americans in the World letter. Along with the other Alamo defenders, they were all killed and burned after the Battle of the Alamo.