Was slavery behind the Alamo

Answer 1

The Alamo was already a hundred years old at the time of the siege and battle. It was founded in 1718 as a Spanish mission for the purpose of Christianizing the Indians indigenous to the area. The Indians themselves built the mission under the supervision of the Spanish priests and it was named Mission "San Antonio de Valero." The church was designed without the benefit of a master engineer, the roof collapsed almost immediately, and this portion of the mission was never actually completed.

Answer 2

Not particularly, no. The Battle of the Alamo was part of the Texas Revolution, fought to determine whether Texas would be a part of Mexico or an independent country (nominally, at least... most of those who wanted it not to be part of Mexico actually had intentions of it ultimately joining the United States).

The issue of slavery was just one factor; probably not even the most important one. Texans resented the demands of the Mexican government that they raise food crops (they wanted to raise cotton, which was more profitable).

Answer 3

The battle of the Alamo was during the Texas Revolution, and a primary cause for that war was slavery being illegal in Mexico, so yes.