You're singing my song. I don't know how many letters I wrote to Army powers that be and others about that issue. "Army of One" is pathetic, it's an echo of the me, me, me syndrome. Army is about TEAM WORK, like the train. Whoever dreamed up that line needs to be fired, courts-martialed or whatever.
Military slogans can be powerful stuff, morale builders, team builders, to the point of a battle-cry. Can you imagine, "Ok men, CHARGE--ARMY OF ONE!!" and one soldier breaks onto the field, really great.