The Secret Avengers was founded by Captain America in response to the Civil War|Superhuman Registration Act, set up precisely for those who wanted to fight against Iron Man's initiative for superhuman registration. After the death of Captain America at the hands of a sniper, the group known as the Secret Avengers has been disbanded and the majority of the core members have joined the underground Avengers.
Following Norman Osborn's siege of Asgard, the reborn Steve Rogers repealed the Superhuman Registration Act and was appointed the new Head of Security for the United States. Under his authority, he commissioned a strike team consisting of Ant-Man, Beast, Black Widow, Moon Knight, Nova, Sharon Carter, Valkyrie, War Machine, and Rogers himself. Their goal is to stop mankind from destroying itself, and their first assignment was to deal with the threat of the Serpent Crown.
* "Secret Avengers" is used here for reference only. The term is not used by the inhabitants of the Marvel Universe.
