Before revision: The USS Vincennes at Disappointment Bay in Antarctica in early 1840 The United States Exploring Expedition of 1838–1842 was an exploring and surveying expedition of the Pacific Ocean and surrounding lands conducted by the United States.
After revision: The USS Vincennes at Disappointment Bay in early 1840 The United States Exploring Expedition of 1838–1842 was an exploring and surveying expedition of the Pacific Ocean and surrounding lands conducted by the United States.