What was the third part of James k. Polk's war plan? 1.) to capture Mexico city 2.) to seize California 3.) to drive Mexicans out of borderlands 4.) to seize New Mexico
The third part of James k. Polk's war plan was to "1.) to capture Mexico city". This fell outside Polk's usually craving for manifest destiny, which up until then have only been an east-to-west route.
