Convoy
A convoy is a group of vehicles, typically motor vehicles or ships, traveling together for mutual support and protection. Often, a convoy is organized with armed defensive support. Civilian convoys may be organized, for example when driving through remote areas. A convoy also allows an organized group to arrive together with their equipment. They can start working together immediately, for example at an emergency. A convoy on land is sometimes called a caravan.
Convoys at sea came into widespread use when warships were made as a different kind of ship. They endangered enemy merchant ships that were not protected by friendly warships.
Convoy Media
Allied convoy in Bedford Basin, Nova Scotia on 1 April 1943
A convoy of merchant ships protected by airplanes en route to Cape Town during World War II
The covering forces of the Convoy PQ 17 at anchor in the harbor at Hvalfjord, Iceland, 1942