What was the name of the U.S. attempt to purchase California from Mexico?

The correct answer is the Slidell Mission, which refers to the diplomatic effort made by President James K. Polk in late 1845. The mission was led by John Slidell, who was tasked with negotiating the purchase of California and other territories from Mexico. This attempt was part of a broader strategy related to the expansionist goals of the United States, often referred to as Manifest Destiny.

While the Slidell Mission was significant, it was ultimately unsuccessful as the Mexican government refused to meet with Slidell. This failure contributed to the increased tensions between the United States and Mexico, eventually leading to the Mexican-American War in 1846. The war would ultimately result in the U.S. acquiring California and other territories through the Treaty of Guadalupe Hidalgo in 1848.

The other options do not pertain to the specific attempt to purchase California. The Mason-Dixon Line relates to the boundary between Pennsylvania and Maryland and the division between free and slave states. The Crittenden Compromise was a last-ditch effort to avoid the Civil War by addressing the issue of slavery in new territories. The Compromise of 1850 was a series of legislative measures aimed at addressing the status of territories acquired during the Mexican-American War, but it