Isle of Man Steam Packet Company England, Wales, Scotland and Ireland. Ports served included Liverpool, Silloth, Whitehaven, Holyhead, Ardrossan, Blackpool, Belfast and Dublin. Vessels and crews of the company were actively involved in both the First and Second World Wars. One vessel, , was attached to the British Grand Fleet and led the German High Seas Fleet into Scapa Flow in the Orkney Islands at the end of the First World War. Another vessel, "Viking", was converted to become a seaplane carrier, serving as . During the First World War, eleven out of a total fleet of fifteen Steam Packet ships were requisitioned by the Admiralty.
The Netherlands in World War I citizens were in demand as spies, as they could travel freely throughout Europe. Some of these spies were executed for espionage. Haicke Janssen and Willem Roos, two unemployed Dutch sailors, were executed in 1915. Exotic dancer and courtesan Mata Hari, convicted of spying for Germany in France, was executed in 1917. In total seven Dutch citizens were executed by the British, French, and Germans. Many more were imprisoned. The Netherlands in World War I The Kingdom of the Netherlands was neutral during World War I. This stance arose partly from a strict policy of neutrality in international affairs that started