Carl Gustav Fleischer (1883-1942) was a Norwegian general and the first allied general to win a major victory against the Nazi-Germans in World War II.

In late May 1940, as commander of the Norwegian 6th division, Maj. Gen. Carl Gustav Fleischer coordinated Norwegian, French, Polish and British forces in the recapturing of Narvik from Maj. Gen. Eduard Dietl's Austro-German Mountain Division. This was the first major allied infantry victory in WWII. Unfortuantly, after the German invasion of France and the Low Countries, launched on 10 May 1940, the Allied task force was withdrawn in early June. Without the support from the Allies, the Norwegian Army alone was not able to defend its posistions and the Germans recaptured Narvik on June 9th. After Norway's surrender, General Fleischer followed the Norwegian king and the government into exile in England as commander of the Norwegian exile army.

General Fleischer was known as an excellent and righteous officer and soldier who had been very critical of the Labour Party's pacifist policies and razing of the Norwegian Army during the 1930s. The relative ease with which the Germans were able to execute Operation Weserübung proved he had been fatally right. Most likely because of a personal antagonism due to this fact, General Fleischer was bypassed when the the exile socialist government of prime minister Johan Nygaardsvold decided to recreate the post of commander-in-chief of the Royal Norwegian Armed Forces. This post had existed temporarily during the 1940 campaign, but General Otto Ruge , who had been commander-in-chief during the campaign, stayed in Norway and surrendered with his troops. Instead of Fleischer, who was the obvious choice, the cabinet promoted the young Major Wilhelm von Tangen Hansteen directly to Lieutenant General and gave him the post.

The cabinet ordered General Fleischer to take up a new post as commander of Norwegian forces in Canada. Apart from the Royal Norwegian Air Force's training base "Little Norway " near Toronto, which was already headed by Ole Reistad , there were no Norwegian forces in Canada. On December 1, 1942, General Fleischer was ordered to the position of Military Attaché to Washington D.C. This was another obvious degrading, since usually officers of the ranks of Major or Lieutenant-Colonel were serving in this position. Being too much for him to swallow, he shot himself with his own gun through the heart on December 19th, 1942.

When his ashes were brought back to Norway after the war, the Labour cabinet denied him a state funeral. Despite the presence of the King, the Crown Prince, and representatives of all other parts of Norwegian society, no representatives of cabinet or the Labour Party attended. When a monument to his honour was raised at the headquarters of the 6th Division, the same thing happened.