No there was not
the Mexican cession was the result of war with Mexico.
1848, after the Mexican-American War.
The Texas annexation purchased the Mexican cession.
The Mexican-American War, and the resulting Mexican Cession, were during the presidency of James K. Polk.
The Mexican War resulted in the Mexican Cession and the Treaty of Guadalupe Hidalgo ended the Mexican War.
The Mexican cession was the outcome of the Mexican American war.
It gave us the Mexican Cession.
The Mexican Cession and the Treaty of Guadalupe Hidalgo.
The Southwest, including California, was taken "by force of arms" from Mexico, during the Mexican War.
US victory and Mexican Cession.
yes they did go to war
America won the war and got the land they wanted.