The U.S. Navy's patrol of the Yangtze River began in 1854 when the USS Susquehanna was sent to China to safeguard increasing American commerce in the region. As Kemp Tolley explains in this entertaining history of the patrol in which he was to later serve, the presence of gunboats along the river greatly benefited the integrity of the shoreline factories. Tolley was a young naval officer in the 1930s when assigned gunboat duty, first in the Mindanao,...