Robert B. Moore, Alamo defender, was born in Martinsburg, Virginia, in 1781. He immigrated to Texas by way of New Orleans as a member of Thomas Breece's company of New Orleans Greys in 1835. Moore took part in the siege of Bexar and later served in the Alamo garrison as a member of Capt. William Blazeby's infantry company. He died in the battle of the Alamo on March 6, 1836. Moore was a cousin of Alamo defender Willis A. Moore.