The 1,000 man legion

[Timotheus]

Look at it this way. You train with your comrades in a tight formation, and you are completely oblivious who is standing ten metres to your left or right. It's not your duty to know. Your commander barks his orders and you carry them out, not knowing if the left flank is victorious or the right flank is turned. You need not worry about that, just about your orders and the enemy in front of you. You may be fighting with 500 or 500 men, it matters not. Just carry out your duties.

Which means the individual soldier may do fine but if you think that commanding 200, 500, 5000, or 15,000 men takes the same skills and same amount things from the officers leading them then this conversation really is pointless