Teamwork could be defined as, "The effort of a group to act in accordance with one another." The act of working together with your fellows adds a dimension of civility which un-allied combat might lack.
The place and purpose of involved teams on the foam war field are to provide something larger for the regular attendees to become a part of. The returns are dependant upon the common grounds of a Field and the individual make up of it's teams. A Field's rules provide it with common ground. The style of teams provide it with both a structure to work with and a variety of experiences to explore.
A group becomes a team with the presence of leadership and/or group consciousness. Over time the team members naturally develop their senses for teamwork. These senses are useful in many areas of life, including in mock-combat. During a battle orders may or may not be given, depending on a team's style. Outside of battle efforts to develop skills and strengthen teamwork may or may not occur, depending on team style.
The presence of leadership also provides the team with a spokesman to interact with other teams on a political level. Wether it is the politics of a mob mentality or the order of a military unit, people will interact when grouped together. It may not always be polite, but there will be interaction. The presence of a communication structure helps people to interact more smoothly and to resolve problems in a civil manner.
Teams end up sharing the entire war field's load of students to work with and personality differences to accommodate. By possessing a ranking scheme a team provides a path of progression for students as well as a declared system for interaction between their own members. Teams having different schemes, values, and members, creates entirely different environments for attendees to choose between