What we should admire is the acute fulfillment of the unspoken assumptions, the smooth harmony of the whole activity, which only become evident in the final success.
Carl von ClausewitzEverything in war is very simple, but the simplest thing is difficult. The difficulties accumulate and end by producing a kind of friction that is inconceivable unless one has experienced war. ... Countless minor incidents - the kind you can never really foresee - combine to lower the general level of performance, so that one always falls short of the intended goal.
Carl von Clausewitz