Lieutenant General Viking Sebastian Henricsson Tamm (21 July 1896 – 25 November 1975) was a Swedish Army officer.

In addition to the years he served in the Swedish Army, Tamm led a group of Swedish officers who developed the Ethiopian military school's officer training (1934–36 and 1945–46) and he was a volunteer in the Winter War in Finland in 1940 commanding the II.

[1] Tamm was commissioned as an officer with the rank of second lieutenant in 1916 and was assigned to Svea Life Guards (I 1).

[1] Captain Tamm and the then Chief of Air Force, Major General Eric Virgin, who was employed as the emperor's military political adviser, as well as four other military officers (the lieutenants Nils Bouveng, Arne Thorburn, Gustaf Heüman and Anders Nyblom[2]) entered together into the Ethiopian service to organize the country's only military school for the training of Ethiopian officers.

Tamm became major in the General Staff Corps in 1937 and was promoted to Lieutenant Colonel in 1939.