Opening credits: The story of Texas symbolizes the spirit of independence so close to the heart of all Americans. Her people fought for Mexico's freedom from Spain and lived peacefully as a separate province until... ...General Santa Anna seized the presidency of Mexico. They were then faced with the prospect of military government or war. General Sam Houston was entrusted with the task of mapping a course of action that would determine the future of Texas ....
The Battle of the Alamo was fought in 1836, but John Stroud is wearing a Stetson type cowboy hat that wasn't even invented until 1865. It is more in appearance to the cowboy hats of the 1880s or 1890s.
When Sam Houston enters the town of Franklin and has the townsfolk called together to announce that the Alamo has fallen, he's wearing a blue 1860's Civil War Calvary hat with crossed sabers. The Alamo fell in 1836.