Mexico (1836)
Samoa was the first pacific country to gain their independence
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.
The first country ever to gain independence was San Marino who achieved independence from the Roman Empire.
haitiThe first Latin American country to gain its independence was Haiti.
I cannot tell when your country gain independence because I do not know your country.
Belize was the last country in Central America to gain independence, achieving independence from the United Kingdom in 1981.
San Jacinto River
Honduras gained Independence from Spain
Haiti gained its independence from France.
Britain
Britain