The humans first began using costumed identities to fight or commit crime during the 1930s. The first superheroes included characters like the Crimson Avenger and The Sandman. In November 1940, the first superhero team, the Justice Society of America, was formed. During World War II, all of America's heroes were banded together as the All-Star Squadron to protect the United States from the Axis powers. However, due to a magical spell cast by Adolf Hitler (using the Spear of Destiny and the Holy Grail) the most powerful heroes were unable to enter Axis-held territories, leaving the war to be fought mainly by normal humans such as Sgt. Rock. After the war, under pressure from the paranoid Committee on Un-American Activities, the JSA disbanded. While many types of heroes were active afterwards (mainly non-costumed, such as the Challengers of the Unknown or Detective Chimp), it was not until Superman's public debut that a new generation of costumed heroes became active. Soon after, the Justice League of America was formed, and they have remained Earth's preeminent superhero team; most DC heroes (such as the Teen Titans) have either belonged to the League at some point, or have connections to it.