I was no clerk, nor had I any capacity to become one. The only place I ever found in my life to put a paper so as to find it again was either a side coat-pocket or the hands of a clerk or secretary more careful than myself…[However], there was a clerk in the office of the Adjutant-General who supplied my deficiencies. – U.S. Grant
As far as I can tell, Grant wasn’t a great general because he excelled at every aspect of soldiering. Rather, he excelled at many of them and found talented subordinates to delegate those tasks for which he lacked ability.