The siege of Fort Texas marked the beginning of active campaigning by the armies of the United States and Mexico during the Mexican–American War.

The main American force under General Zachary Taylor advanced from Port Isabel and successfully engaged Arista at Palo Alto on 8 May.

[1]: 50  Since Ampudia's artillery was too light to breach the earthworks and the infantry disinclined to make an assault, the siege continued until 9 May with General Antonio Canales Rosillo's irregular cavalry astride the Point Isabel road preventing supplies from reaching the fort.

[1]: 50 Captain Edgar S. Hawkins took command of Fort Texas when Major Brown was mortally wounded on 6 May at ten o'clock.

[1]: 52 Though the confrontation at Fort Texas lasted six days, with periods of heavy cannon fire, casualties were remarkably low.

[5] Despite his wound, Major Brown had helped maintain troop morale throughout the siege, thus contributing to the success of the defense of the Fort.