Jørgen Martinius Jensen was a Norwegian military officer and sports official.

He was born in Kristiania

Oslo

Oslo is a municipality, as well as the capital and most populous city in Norway. As a municipality , it was established on 1 January 1838. Founded around 1048 by King Harald III of Norway, the city was largely destroyed by fire in 1624. The city was moved under the reign of Denmark–Norway's King...

. He headed the Norges Landsforbund for Idrett

Norwegian Olympic and Paralympic Committee and Confederation of Sports

The Norwegian Olympic and Paralympic Committee and Confederation of Sports is the umbrella organization for sport in Norway. It is the largest volunteering organization in Norway, with more than 2 million members, and 12000 sports clubs, in 19 region confederatons and 56 national federations...

 from 1930 to 1932 and the Norwegian Equestrian Federation from 1936 to 1940. By profession he was a military officer, with the rank of colonel. He headed Opland dragonregiment, a dragoon

Dragoon

The word dragoon originally meant mounted infantry, who were trained in horse riding as well as infantry fighting skills. However, usage altered over time and during the 18th century, dragoons evolved into conventional light cavalry units and personnel...

 regiment, from 1934 to 1943, and was as such involved in battles of the Norwegian Campaign

Norwegian Campaign

The Norwegian Campaign was a military campaign that was fought in Norway during the Second World War between the Allies and Germany, after the latter's invasion of the country. In April 1940, the United Kingdom and France came to Norway's aid with an expeditionary force...

, among others at Åsmarka and Tretten. After the war, from 1946 to 1956, he worked in the Norwegian Armed Forces

Norwegian Armed Forces

The Norwegian Armed Forces numbers about 23,000 personnel, including civilian employees. According to mobilisation plans , the strength during full mobilisation would be approximately 83,000 combatant personnel. Norway has mandatory military service for men and voluntary service for women...

 department of war history.