What territory did the United States acquire from France in 1803?

The territory acquired by the United States from France in 1803 was the Louisiana Territory. This monumental event, known as the Louisiana Purchase, effectively doubled the size of the nation, adding approximately 828,000 square miles of land. The purchase provided the United States with vast tracts of land west of the Mississippi River, greatly facilitating westward expansion and exploration.

The Louisiana Territory was strategically significant as it contained important resources, fertile agricultural land, and access to major waterways, which boosted trade and settlement opportunities. It also set the stage for future exploration missions, like the Lewis and Clark expedition, which aimed to explore and map the newly acquired territory.

The other territories mentioned in the choices either did not exist as formal entities at that time or were acquired through different means. Florida and California were obtained later through different treaties and negotiations, while the Oregon Territory was not acquired from France but rather settled through both negotiation and exploration with competing interests, primarily from Britain.