It claimed its Independence in March 2 1836. This was the date that Texans signed the Texas Declaration of Independence and forming the Republic of Texas. It wasn't until 29th of December 1845 that Texas became one of the state of the United States.
Texas was it's own nation from the years of 1836 to 1835. After the battle of the Alamo, the Texan army continued to fight for their independence under the motto, "remember the Alamo" and after capturing Santa Ana, signed a treaty, giving them independence from Mexico in 1836. Thus, the Republic of Texas was created. Because Texas was once it's own nation, and asked to become a part of the United States (which at the time was a nation worthy of joining) Texas now holds the right to secede from America, and once again become the Republic of Texas. Texans still hold true to the movement of secession.
The United States didn't gain any land during the Texas War of independence. It annexed Texas after it had won its independence and was a free nation.
1893 it gain independence
Mexico
It was the year Texas gained it"s independence from Mexico
Texas won its independence on the year 1836.
Mexico (1836)
San Jacinto River
in the year 1946
year 1821
Mexico gained independence in the year of 1821.
San Jacinto River
Texas got its independence from Mexico in April 1836 and the president was sam Houston