I am not sure that it would have been an entire year. General Andrade destroyed the Alamo and spiked many of the guns and buried them, dumping the ammunition in the river, before he evacuated the town and joined the general Mexican retreat from Texas in May 1836. In 1813, the single-largest battle ever fought in Texas, the Battle of the Medina, was a rout of a Criollo/Mexican, North American filibuster, and Native American "Republican Army of the North" by royalist troops supportive of the Viceroy and Spanish colonial rule. It was a young 2nd. Lt. Santa Anna's first battle. His superior, from whom he learned much, was General Joaquin de Arredondo. The royalists slaughtered the wounded and summarily executed captives on the field. Those remains were left exposed and un-buried for a very long time. I think that some large bones--skulls/craniums, femurs, etc. that the coyotes and vultures hadn't gotten to were buried finally in 1821 when Mexico gained its independence. That mass grave has never been found. I suspect and surmise that loved ones went to the battlefield--the location of which remains unknown--and interred their slain in secret. Now that I've been poring over the rank of de la Peña, it appears that his Lieutenant Colonel rank was a "brevet" rank, and that in the cavalry he was a captain.