The United States formally enters World War II after the attack on Pearl Harbor, setting the stage for the development of super soldiers.
During WWII, various countries pursued enhanced soldier programs, including experimental research, although none matched the fictional super soldier serum.
The end of World War II leads to significant geopolitical changes and the start of the Cold War era, impacting global military and scientific developments.
The movie Captain America: The First Avenger is released, bringing to life a fictionalized version of WWII events intertwined with superhero mythology.
Steve Rogers tries to enlist in the US Army multiple times but is repeatedly rejected due to his physical condition. Eventually, he is accepted into a special military program.
Steve Rogers undergoes the Super Soldier experiment where he is injected with the super soldier serum and exposed to vita-rays, transforming him into Captain America.
After transformation, Steve is assigned to a USO tour to promote war bonds and boost morale rather than frontline combat.
Steve is sent on a mission and learns of the Red Skull's plans to weaponize the Tesseract's energy to create powerful weapons.
Captain America leads a mission to rescue captured soldiers and retrieve information from a Hydra base, confronting Red Skull and his forces.
Captain America battles Red Skull, who uses the Tesseract-powered weapon, which is ultimately destroyed. Red Skull disappears into a portal created by the Tesseract.
To prevent a Hydra plane loaded with weapons from detonating over a populated area, Steve pilots the plane into the Arctic, crashing and becoming frozen in ice.
