When a soldier had become a sergeant, they had the privilege to create their own team. By creating a team, they could do some team mission. Not only that, but during some military's mission, they could go with their own team.
Of course, it was not every mission. For some mission, the military was the one who chose their subordinate like what happened during the demonic stick's extermination mission. But, most of the time, the team could go with their own team.
That was not the only benefit by creating a team. Because of the many teams formed, the military created leaderboards which showed the rank of each team. There were 5 leaderboards from the sergeant leaderboard up until the general leaderboard.
The leaderboard where the team would be listed depended on the highest ranked soldier in the teams. Usually, it would be the leader. If the highest-ranked soldier was a sergeant, then they would be listed in the sergeant leaderboard.