"O Lord, Thou knowest how busy I must be this day. If I forget Thee, do not thou forget me" General Jacob Astley before the first battle of English Civil War.
Because not worrying about your flanks is a terrible idea. Also it was a boisterous lie, if he didn't care about his flanks he wouldn't have ordered those idiotic assaults on Metz fortresses.
I think Patton is the most overrated commander of WWII, he was lucky he faced the Germans when Allies had complete supremacy, a year earlier they would have cut his bloated ego in pieces.
''It is easier to kill Russians than it is to defeat them.'' Frederick the Great after the battle of Zorndorf. He forgot this during battle of Kunersdorf