Justice League of America / JLA commonly shortened to the Justice League is a group of publishers DC Comics superhero. In the early formation of this group consisted of Superman, Batman, Wonder Woman, Flash, Green Lantern, Aquaman and Martian Manhunter. as the development of the members of the JLA become more varied and pioneering members of the disappeared one after satu.JLA and JSA (Justice Society of America) is a well known group of superheroes in the DC Comic world, known as the DC Universe. Over time, the JLA personnel began to grow. Zatanna, Green Arrow, Red Arrow (Arsenal), Black Lightning, Black Cannary, etc..
In 2004 DC comic in collaboration with Warner Bros. Serian published JLA movie. Where the main squad is Superman, Batman, Wonder Woman, The Flash, Green Lantern, Martian Manhunter and Hawkgirl. The story begins with the invasion of foreign countries to the United States. JLA member who was not yet confirmed Martian Manhunter infiltrate into the enemy base and find the Martian Manhunter who was held captive. They tried to help her and began a mission seven. But there are episodes where the seven core members had disappeared and was replaced by Green Arrow as the chairman and other members.
In 2007, DC announced a new squad of the JLA, in the form of Superman, Batman, Wonder Woman, Red Tornado, Black Cannary, Green Lantern, Hawkgirl, and Black Lightning. Then add 1 more personnel who have not known the name and strength.
quoted from wikipedia.com