The tramways in Plymouth were originally constructed as four independent networks operated by three different companies to serve the adjacent towns of Plymouth, Stonehouse and Devonport in Devon, England. The merger of the 'Three Towns' into the new borough of Plymouth in 1914 was the catalyst for the three companies to join up under the auspices of the new Plymouth Corporation. The network was closed in 1945, partly as a result of bomb damage during World War II.