The whole territory of Texas.
Between the Rio Grande and Nueces rivers.
Texas was never a territory of the US, before it was a state Texas was a country called The Republic of Texas, it had its own army and navy as well as its own president.
There were three actually. There was the Republic of Vermont, the Republic of California, and the Republic of Texas (which is the most well known). That was Texas. They seceded from Mexico and, for a short time, were independent people. Once America overcame their problem with accepting Texas (they didn't want to anger Mexico, since they still laid clame to the territory) they sent troops to Texas and provoked the Mexican people to attack them. Hawaii was an independent nation before becoming a territory of the United States and later becoming a state.
as soon as they got there independence from Mexico
The Rio Grande valley was historically disputed between Texas and Mexico.
The Republic of Texas claimed a small portion of present day south central Wyoming from 1836 to 1850, although that claim was disputed by Mexico. The exact location is difficult to determine because it was based on the headwaters of the Arkansas River, which were not known to the Republic of Texas at the time. One suggestion is that the area claimed by the Republic of Texas is roughly what is now Carbon County in Wyoming.
Texas was an independent country from the end of the Texas War for Independence from Mexico until 1845 when it became a state. The country was known as the Republic of Texas. Before that, it was a territory of Spain, France and Mexico. In 1861, Texas joined the Confederate States of America. So Texas has flown six flags over its territory: those of Spain, France, Mexico, the Republic of Texas, the Confederate States of America, and the United States.
Enmity. Texas was viewed as a rebel territory, to be later re-acquired by peaceful means, but by force if necessary.
Mexico refused to recognize the rio grade as the southern and western boundary of texas
what did the republic do to fail texas
To Texas since it had held Independence under the Treaty of Velasco for almost a decade as a proclaimed Inde[endent Republic prior to applying for statehood. California could ponly be claimed as a part of its occupation during time of war. The failure of Mexico to ratify the Treaty of Velasco was not a US problem, nor was the failure of Texas to comply fully with the terms of that Treaty. The US could at least claim to have been dealing in good faith with the Republic of Texas.