He got as high as he could possibly get in the army in OTL, I wonder if his career will do the same with some other major victories.
He's probably going to have a bit of a faster career TTL, the "American War" will mark him for advancement. Though directly commanding a body of troops will probably take some time as he's been attached to the staff thus far and not yet assigned for even training duties. His first command didn't come until 1870 with the Red River Expedition. Though butterflies may mean that, unlike his historic first command which got overshadowed by the Franco-Prussian War, he may get more time in the spotlight when he finally takes center stage.