Creation of the Republic of Texas and its eventual impact on the U.S. war with Mexico

  creation of the Republic of Texas and its eventual impact on the U.S. war with Mexico. How did U.S expansion lead to the Texian rebellion and the creation of the Republic of Texas? How did this in turn lead to the U.S war with Mexico? Initial Posting (300+ words): Provide a summary of both the creation of the Republic of Texas and how the entrance of Texas into the United States led to War with Mexico? How did the United States use these circumstances to declare war on Mexico and what was the motive?