Texas Annexation was in 1845.
The Texas Annexation of 1845 was the annexation of the Republic of Texas to the United States of America as the 28th state.
the Texas annexation was a result of war between the U.S. and Spain. It was acquired by the United States between 1844-1845. Hope this helps!!!
The Texas Annexation isn't a territory. It was later on in the process of making tohe united states. It was acquired o ow it was gotten was by
Texas was acquired in1845 from santa Anna, (Mexico) and they had a war about who Texas belonged to, and for a while Texas was a country of its own. :]