As relations soured between Texas colonists and the Mexican government, Johnson began to advocate for war. In the summer of 1835, Mexican general
Martin Perfecto de Cos issued warrants for the arrest of Johnson and five other men, all accused of land speculation or attacking Anahuac. Local officials refused to enforce the warrants, and the men were never arrested. All of the men were well respected in their communities, and the warrants greatly angered other colonists. This, combined with news that Cos was leading a large military force to Texas, convinced many colonists to embrace the idea of revolt.
Siege of Bexar When the
Texas Revolution began in October 1835, Johnson was named the adjutant and inspector general of the volunteer forces, which were led by Austin. Two weeks later, Austin resigned as commander of the Texian Army and called an election to appoint the new commander. Burleson won handily. As the siege progressed, many of the Texians left the army to return to their homes. On December 4, Burleson called a meeting of the troops and suggested that they withdraw to
Goliad for the remainder of the winter. As the troops discussed the possibility, a Mexican cavalry officer arrived in their camp and asked to surrender. He explained that Mexican morale inside Bexar was very low. This news boosted the spirits of the Texians, and
Ben Milam challenged the men to join him in an assault on the town. Milam formed the men into two divisions, which would simultaneously attack the empty houses on the outskirts of Bexar. Milam led one division, and Johnson, now a colonel, was appointed commander of the second. Johnson's division numbered 177 men divided into 7 companies. They were guided by
Deaf Smith and John W. Smith. Early on the morning of December 5, Colonel
James C. Neill created a distraction by ordering the artillery to fire on the walls of the
Alamo Mission. For the rest of the day, Johnson and his men worked to fortify the Veramendi home, digging trenches and creating earthworks around the yard. For the next several days, fighting house to house, the Texians gradually closed in on the fortified Mexican positions in Bexar's main plazas. On the afternoon of December 7, Milam came to the Veramendi house to consult with Johnson. As they spoke, a Mexican sharpshooter killed Milam; the sharpshooter was quickly killed by Texian fire. Johnson oversaw Milam's burial in one of the newly dug trenches. With Milam's death, Johnson assumed command of the battle. He assigned Robert C. Morris to oversee Milam's column of men. The Texians continued to fight their way from house to house, slowly driving back the Mexican troops. The Texian advance had further demoralized the Mexican troops, and a Mexican cavalry company deserted on December 9. Shortly after that, Mexican General
Martin Perfecto de Cos sent one of his officers to negotiate a surrender. Johnson served on the negotiating team. The
siege of Bexar officially ended when the two sides adopted the surrender agreement on December 11. The Mexican soldiers were set free on the condition that they return to Mexico within six days and not take up arms against the Texians again.
Army command With Cos's departure, there was no longer an organized garrison of Mexican troops in Texas, and many of the Texians believed that the war was over. Johnson described the battle as "the period put to our present war". Burleson resigned his leadership of the army on December 15 and returned to his home. Many of the men did likewise, and Johnson assumed command of the soldiers who remained. During this time, the
provisional government had created a new regular branch of the
Texian Army and placed
Sam Houston in charge. Houston was given no authority over the volunteers, however, leaving Johnson as their commander. In the relative quiet after the Mexican garrison left,
Dr. James Grant began advocating an
attack on Matamoros. Many of the remaining Texian soldiers approved of the mission and clamored for it to begin. On December 25, Grant traveled to
Washington on the Brazos to convince the provisional government to support the plan. The Governing Council agreed, but secretly named Johnson and
James Fannin co-commanders of the expedition. On January 3, Johnson and Grant left Bexar, taking with them 300 of the 400 men who had been stationed there. This incensed Colonel
James C. Neill, who remained at the
Alamo to lead the remaining men. On January 6, 1836, Neill wrote to the governing council: "If there has ever been a dollar here I have no knowledge of it. The clothing sent here by the aid and patriotic exertions of the honorable Council, was taken from us by arbitrary measures of Johnson and Grant, taken from men who endured all the hardships of winter and who were not even sufficiently clad for summer, many of them having but one blanket and one shirt, and what was intended for them given away to men some of whom had not been in the army more than four days, and many not exceeding two weeks." The Texan provisional governor,
Henry Smith, strongly opposed the Matamoros expedition and loudly proclaimed that anyone who supported it was a traitor or an idiot. Smith then dissolved the governing council, which responded by impeaching him. The temporary Texas constitution had given neither Smith nor the council the right to depose the other, and both groups continued to insist that they were the rightful rulers. On January 10, Johnson issued a call to form a Federal Volunteer Army of Texas which would march on
Matamoros. On January 14, Houston arrived in Goliad to take command of the army that Johnson and Grant had gathered. On his arrival he discovered that Grant and Johnson were calling themselves commanders of the army. Houston accompanied the army as it marched to Refugio. Once there, he gave a speech and pointedly asked how this small group of men planned to take a city of 12,000 people. Later that day, Houston received official word that he had been fired and that the council had now placed James Fannin in charge of the army. Houston left in disgust and traveled to
East Texas to negotiate a peace treaty with the
Cherokee. For the next several months it was unclear who was in charge of the Texian army—Fannin, Johnson, Grant, or Houston.
Battle of San Patricio Johnson and Grant settled in
San Patricio, where they continued to make plans to invade Mexico. In mid-February, Grant took about two dozen men south to catch wild horses. While Grant was gone, Mexican General
Jose de Urrea led a surprise attack on San Patricio in the early hours of the morning of February 27. Most of Johnson's men were killed, but Johnson escaped. Grant was also later surprised by Urrea's army, while they camped at
Agua Dulce Creek. When Johnson received word that Houston was retreating towards East Texas, Johnson became disgusted with the revolution and up and quit. He returned to his home for the remainder of the conflict. ==Later years==