Pedro thought he would be a cowboy. But since his father's death, who will train him? Will he spend his life helping his mother with ranch chores? Tio Pablo returns from the Battle of Concepcion with news. Is there a place for ten-year-old Pedro on a Texas Navy ship? In 1836, after the battle of the Alamo and the Texas Declaration of Independence but before the decisive battle of San Jacinto, the Texas Navy ship Invincible procured supplies for Texas that were intended for the Mexican army. This was a turning point in the Texas fight for independence from Mexico.