The Battle of the Alamo, fought in 1836 between the Republic of Texas and Mexico, was considered a "psychological victory" for the Texan forces. This was because the battle became a symbol of Texan resistance against Mexican rule, and it inspired many people to join the fight for independence.
Although the Texan forces were ultimately defeated and all of the defenders were killed, their brave and determined stand against a much larger army became legendary. The famous battle cry "Remember the Alamo!" became a rallying call for the Texans, and it helped to stir up support for their cause.
Furthermore, the Battle of the Alamo was widely reported in the American press, and it helped to draw attention to the struggle for Texan independence. This publicity helped to garner support for the Texans from the United States, which eventually led to their victory and the formation of the Republic of Texas.
Thus, while the Battle of the Alamo was a military defeat for the Texans, it was a psychological victory in terms of its impact on the morale and determination of the Texan forces, and its role in inspiring support for their cause both in Texas and beyond.