Question

What are John L O'sullivan's words on manifest destiny?

Answer 1

It was initially used in regards to Mexican and Indian land in Texas and the Southwest. The concept was invoked later in a dispute with Great Britain over Oregon and in relation to territory controlled by the United States as a result of the Spanish-American War. That was the reason, now if you're asking what his words on Manifest Destiny were, it was used by American expansionists to justify U.S. annexation of Texas, Oregon, New Mexico, and California during the 1800's.