Across the United States this year, people are making plans to celebrate the 250th anniversary of the Declaration of Independence. While much of the focus on site-specific celebrations will be on the East Coast, there’s an important West Coast connection to 1776. Spain also established El Presidio de San Francisco in 1776 to guard San Francisco Bay from British, Russian, and French incursions into Alta California, a province comprising modern-day California, Nevada, Utah, Wyoming, Colorado, and parts of Arizona. Want to learn more? Read my story for National Geographic.