<span>He used heavily armed planes. </span>
He came up with Scientific Method which was a new approach toward problem solving and explaining what had been previously been discovered.
It stemmed from the annexation of the Republic of Texas by the U.S. in 1845 and from a dispute over whether Texas ended at the Nueces River (the Mexican claim) or the Rio Grande (the U.S. claim).
Hopes it helps you !
Answer:
I'm pretty sure you got it right.