What are the different positions in lacrosse and what does each position do?

Positions in Men's Lacrosse include:

Every position in lacrosse is allowed to try and score!

Offense (aka Attack):

• There are 3 attack on the field for each team
• Attack is guarded by the opposing teams defense
• Attack must start within the restraining box until a team gains possession after the face-off. The referee will yell "release"
• The attack cannot cross the midfield line unless an equal number of midfielders or defenders stay back in his place. (There cannot be more than 6 players from one team on a single side unless on defense in which case you can have 7, but that includes the goalie)

Midfield:

• Unless there is a penalty there are 3 midfielders on the field for each team
• Midfielders play offense and defense usually against the opposing teams midfielders.
• Midfielders can move freely around the entire field.
• If a defensive or attack man wishes to cross the midfield line usually a midfielder will stay back. (I recommend raising your stick in the air to show the referee you are the one that stayed back for your teammate that crossed)

Defense (aka "D-pole," "Poles"):

• There are 3 defenders on the field for each team
• Defensive players guard the opposing teams attack
• Defensive players must start within the restraining box until a team gains possession after the face-off
• A defensive player cannot cross the midfield line unless an equal number of midfielders or attack stay back in his place. (There cannot be more than 6 players from one team on a single side unless on defense in which case you can have 7, but that includes the goalie)

Face-off Midfielder:

• Same as other midfielders except this midfielder takes the face-off against the opposing team's face-off midfielder. (Some teams designate someone as the face-off midfielder and some do not.)

Long Stick Midfielder (aka "LSM")

• The LSM is a midfielder but is mostly there to prevent a fast break after the face-off. 
• The LSM will have a defensive stick
• If your team gains possession it is likely the LSM will sub off for a regular (short stick) midfielder
• If your opponent gets possession it is likely the LSM will stay in and play defense to try and steal the ball.

Note: There cannot be more than 4 players with defensive sticks on the field at any time