who was the war fought between?
Between Republic of Texas and Mexico
Battle of the Alamo
The Battle of the Alamo (February 23 – March 6, 1836) was a pivotal event in the Texas Revolution. Following a 13-day siege, Mexican troops under President General Antonio López de Santa Anna reclaimed the Alamo Mission near San Antonio de Béxar (modern-day San Antonio, Texas, United States), killing the Texian and immigrant occupiers. Santa Anna's cruelty during the battle inspired many Texians, both legal Texas settlers and illegal immigrants from the United States, to join the Texian Army. Buoyed by a desire for revenge, the Texians defeated the Mexican Army at the Battle of San Jacinto, on April 21, 1836, ending the rebellion.

where did the battle of alamo take place San Antonio de Béxar
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Battle of the Alamo [SEP] Introduction
In the early morning hours of March 6, the Mexican Army advanced on the Alamo. After repelling two attacks, the Texians were unable to fend off a third attack. As Mexican soldiers scaled the walls, most of the Texian fighters withdrew into interior buildings. Occupiers unable to reach these points were slain by the Mexican cavalry as they attempted to escape. Between five and seven Texians may have surrendered; if so, they were quickly executed. Several noncombatants were sent to Gonzales to spread word of the Texian defeat. The news sparked both a strong rush to join the Texian army and a panic, known as "The Runaway Scrape", in which the Texian army, most settlers, and the new, self-proclaimed but officially unrecognized, Republic of Texas government fled eastward toward the United States ahead of the advancing Mexican Army.