" "Members of the military are banding together to redress Congress to end the war in Iraq and bring the troops back home. Most of the young men are still active members of the military and will be going back to Iraq for another tour of duty.

sentence #1: if more than one member of the military is in this organization, then sentence #1 is true."

Right I think it's probably safe to assume 2 to 3 were members of the miltary. But there may been a dozen or more. Hence it's not accurate.
"Some Members of the Miltary" is more accurate than "Members of the miltary". Or "a lot of members of the miltary" is more accurate than "members of the miltary". Obviously, an actual number like say 142, is the most accurate.