Introduction Intensified submarine warfare, a form of submarine warfare practiced by Germany in the first months of 1916, represented a German political compromise between the internationally recognised Prize Rules (which made submarines virtually ineffective as commerce raiders) and unrestricted submarine warfare (in which submarines sink merchant ships operating in designated War Zones without warning, and… Read More

Introduction Unrestricted submarine warfare is a type of naval warfare in which submarines sink vessels such as freighters and tankers without warning, as opposed to attacks per prize rules (also known as “cruiser rules”). Prize rules call for warships to search merchantmen and place crews in “a place of safety” (for which lifeboats do not… Read More