A modern US marine platoon consists of normally 42 men, 3 squads of 13 men divided into 3 fireteams of 4 men and a squad leader and a platoon headquarters element of a platoon commander, platoon sergeant and a navy corpsman.
Humvees, sniper teams, casualties and medics, AAV-7A1's and air support (probably a cobra gunship) to follow.......
Just as a sidebar, I've had to delete the old blogroll as I couldn't add or delete any blogs, so I've had to go through the nearly 1000 blogs I was following and start adding again, bear with me as this will take a little while and apologies if I missed you at the moment......