The existing state of the relations between the United States and Mexico renders it proper that I should bring the subject to the consideration of Congress.
He was claiming that because the US had assumed all the territorial claims of Texas in annexing it, the land between the Nueces River (which enters the Gulf at Corpus Christi) and the Rio Grande (which enters at Matamoros) was US soil, so he ordered General Zachary Taylor into the disputed area. This is where the skirmish with Mexican forces happened.
Polk says that American blood was shed on American soil. But where was that spot?
He was claiming that because the US had assumed all the territorial claims of Texas in annexing it, the land between the Nueces River (which enters the Gulf at Corpus Christi) and the Rio Grande (which enters at Matamoros) was US soil, so he ordered General Zachary Taylor into the disputed area. This is where the skirmish with Mexican forces happened.