Just a final follow up. Reinforcements come in with 4 jeeps. So, in order to get ammo: 1 minute to dismount jeep - 1 minute for 3 man platoon to embark -- 1 minute to acquire and dismount -- 1 minute for drivers to remount. Finally in the next minute you drive away. To catch up to the running teams I had the platoon drive the jeep to destination but you cannot dismount till the minute after arrival (which amounts to the same amount of time as the former). 5 minutes to get to orders!
Thanks all. Great community!