20 Essential Comic Issues You Must Read Before You Die
14. The Avengers #4
Despite being one of the team's most famous members and its frequent leader, Captain America didn't actually found the Avengers.
He instead joined the team in their fourth issue after he was found frozen in ice by Namor. He then saved his teammates from a group of aliens and cemented his place as their leader.
The issue itself may be a pretty basic story, but it marked the point at which the Avengers became the iconic team they're known as today and helped lay the foundation that a lot of the modern Marvel Universe would be built on.