Describe the 1848 discovery of gold at Sutter's Mill and the California Gold Rush's role in rapid statehood, connecting to prior knowledge of California history.
On January 24, 1848, a man named James Marshall discovered gold while building a sawmill for John Sutter -- the same Swiss immigrant who had built a settlement in Mexican California in the 1840s -- at Coloma, California. In an extraordinary coincidence of timing, this happened just days before the Treaty of Guadalupe Hidalgo, signed in February 1848, formally transferred California from Mexico to the United States at the end of the Mexican-American War. News of the discovery spread fast, and by 1849, tens of thousands of "49ers" flooded into California from across the United States and around the world, including China, Latin America, Europe, and Australia, transforming San Francisco from a small town into a booming city almost overnight.
This sudden population explosion let California skip the usual territorial stage entirely and apply directly for statehood, becoming the 31st state in 1850 as part of the Compromise of 1850, a deal in Congress balancing free and slave states -- California entered as a free state, an important and contested fact tied to the nation's growing divide over slavery. This week connects directly back to what you may already know about California history: the same Gold Rush, now seen in its full national context, at the exact moment California was becoming part of the United States.
Mastery looks like: They can state the date and location of the gold discovery, connect it to the Treaty of Guadalupe Hidalgo's timing, and explain why California's statehood came so quickly.
Common stumbles: Not connecting this week to any prior knowledge of California history; missing how unusually fast California's statehood came compared to other territories.