Nazi Party
"Deutsche Gemeinschaft" was a branch of the Nazi Party founded in 1919, created for Germans with "Volksdeutsche" status. It is not to be confused with the post-war right-wing "", which was founded in 1949.
Sturmabteilung
The term predates the founding of the Nazi Party in 1919. Originally it was applied to the specialized assault troops of Imperial Germany in World War I who used Hutier infiltration tactics. Instead of large mass assaults, the were organised into small squads of a few soldiers each. The first official German Stormtrooper unit was authorized on 2 March 1915. The German high command ordered the VIII Corps to form a detachment to test experimental weapons and develop tactics that could break the deadlock on the Western Front. On 2 October 1916, Erich Ludendorff ordered all German armies in the west to form a battalion of stormtroops. They were first used during the 8th Army's siege of Riga, and again at the Battle of Caporetto. Wider use followed on the Western Front in the Spring Offensive in March 1918, where Allied lines were successfully pushed back tens of kilometers.