Answer:
-technological advance like Steam powered riverboats
-means to control disease
-they were no longer confined to the coast
False it occurred in 1940
Answer:
William Crawford Gorgas, (born Oct. 3, 1854, Mobile, Ala., U.S.—died July 3, 1920, London, Eng.), U.S. Army surgeon who contributed greatly to the building of the Panama Canal by introducing mosquito control to prevent yellow fever and malaria.
Explanation:
Answer:
horses were introduced to Europe by the Americans.
