This is a timeline of the Republic of Texas, spanning the time from the Texas Declaration of Independence from Mexico on March 2, 1836, up to the transfer of power to the State of Texas on February 19, 1846.
April 21 – Battle of San Jacinto: Texian army under Sam Houston overwhelmingly defeats Mexican force under Santa Anna, securing Texas independence. Santa Anna captured.
October 22 - Sam Houston becomes president of the republic.
1837
March 1 - The United States recognizes Texas's independence.
April - Houston becomes the sixth temporary capital of the republic March 1,1837
1838
October 5 - Disaffected band of Cherokee kills or abducts 18 extended-family members in the Killough massacre, the largest Native American attack on white settlers in Texas.
March - An uprising of Nacogdoches-area Tejanos who did not support independence from Mexico culminated in the Córdova Rebellion and its defeat at Battleground Prairie in Guadalupe County.
July 12 - The Cherokee under The Bowl accept President Lamar's proposal of relocation to the adjacent Arkansas Territory in the United States but refuse to begin preparations for departure after asking for an extension to collect their already planted crops.
July 15 - The first day of the Battle of the Neches repulses a Cherokee attack against the Texian army under General Kelsey Douglass.
July 16 - The second day of the Battle of the Neches ends in a rout of the Cherokee, scattering them and their allies from their settlements on the upper Neches. Generals Rusk and Burleson command the Texians, and Vice President David G. Burnet and Secretary of War Albert Sidney Johnston are both wounded. Both Cherokee chiefs, The Bowl and Big Mush, are killed.
September 25 - France recognizes Texas's independence.
June - 321 men under Hugh McLeod and George Thomas Howard at the behest of President Mirabeau B. Lamar began an invasion of Santa Fe. After confusing the Wichita River for the Red River they arrived on October 5 near present-day Tucumcari, New Mexico, were captured without firing a shot and were marched to prison at the San Carlos Fortress in Perote, Veracruz before ultimately being released in June 1842. The disgrace was to lead to the return of Sam Houston.
December 13 - Sam Houston becomes president of the republic.
1842
March - A division of the Mexican Army led by Ráfael Vásquez invades Texas and captures San Antonio and Goliad, only to withdraw a few days later.
September 18 - 36 Texians are surrounded and killed by the Mexican Army in the Dawson Massacre.
December 26 - 261 Texians are taken prisoner in the ill-fated Mier Expedition, after they cause about 800 casualties in Pedro de Ampudia's force at the Battle of Mier, where they were outnumbered ten to one by the Mexican Army.
December 29 - The people of Austin fire on Texian officials, who attempted to move the government records to Houston at Pres. Houston's request, in the Texas Archive War.
1843
April 24 – August 6, Snively Expedition; an operation led by Jacob Snively to intercept a train of Mexican traders who would be returning from Missouri on the Santa Fe Trail by way of Texas territory and to seize their goods. This was to be in retaliation for the Mexican raids on San Antonio in 1842 and for the mistreatment of Texas prisoners captured in the Mier Expedition and on the Texian Santa Fe Expedition. Despite defeating a detachment of Mexican soldiers on the Arkansas River, they caused a border incident with the United States, and were disarmed by U. S. Dragoons. Those who remained were not strong enough to defeat the guard on the train and returned to Texas.