US Socialism In WWII

The military is socialist!  Wars are intrinsically socialist activities and the US reached peak socialism during WWII.  The federal government spent about half of total US spending to fund the war as you can see in the graph below, and the government made many additional regulations and interventions.   

For example, according to the History Channel, in 1944:

...as World War II dragged on, President Franklin D. Roosevelt orders his secretary of war to seize properties belonging to the Montgomery Ward company because the company refused to comply with a labor agreement.
In an effort to avert strikes in critical war-support industries, Roosevelt created the National War Labor Board in 1942. The board negotiated settlements between management and workers to avoid shut-downs in production that might cripple the war effort. During the war, the well-known retailer and manufacturer Montgomery Ward had supplied the Allies with everything from tractors to auto parts to workmen's clothing--items deemed as important to the war effort as bullets and ships. However, Montgomery Ward Chairman Sewell Avery refused to comply with the terms of three different collective bargaining agreements... In April 1944, ...Roosevelt called out the Army National Guard to seize the company's main plant in Chicago. Sewell himself had to be carried out of his office by National Guard troops. By December of that year, Roosevelt was fed up with Sewell's obstinacy and disrespect for the government's authority. (...Sewell's favorite insult was to call someone a "New Dealer"--a direct reference to Roosevelt's Depression-era policies.) On December 27, Roosevelt ordered the secretary of war to seize Montgomery Ward's plants and facilities in New York, Michigan, California, Illinois, Colorado and Oregon.
In his announcement that day, Roosevelt emphasized that the government would "not tolerate any interference with war production in this critical hour." He issued a stern warning to labor unions and industry management alike: "strikes in wartime cannot be condoned, whether they are strikes by workers against their employers or strikes by employers against their Government." Sewell took the fight to federal court, but lost.
For much of the 20th century, Montgomery Ward, ...reigned as one of the country's largest department store and mail-order retail chains.