The was a naval battle in which the British and Dutch were able to maintain a blockade of German ships. The last major battle of World War I was . World War I ended with the , which was like a truce. The name of the organization of nations whose purpose was to solve conflicts peacefully through negotiations was known as . were first used in World War I because they were needed to cross the muddy and uneven terrain in Europe. Germans used to try to match the might of the powerful British navy. The medical advance that saved soldiers' lives by helping to reset broken bones was the .