When I was in 72-75 the rule was to fight 3 to 1 if you had a choice. In other words a platoon would attack a squad. We did have an annual squad ORTT (operational readiness training test) which was done squad vs squad. But the platoon was the main unit, squads would do recon patrols or ambushes but it was always done as part of a platoon operation. Our platoons and squads were pretty small. When I first went in they were still drafting people and I think it was about 90 days later the draft ended. This put us at an extreme personnel shortage for awhile. In my company 1st platoon was 15 men for almost a year and a half, 2nd platoon was a little better and 3rd platoon my platoon was the largest at about 40 men. Which was broken down into 3-11 man squads and the rest was a Hq section to include PLt. Leadr,Sgt. and RTO's.