Costly Union Victory: The cold and harsh terrain weakened and sickened many soldiers on the Arkansas Post expedition. “Of course no fires were allowed to be built…and the suffering in consequence during the night was extreme,” recalled an Ohio officer in one of Hovey’s fellow brigades. Grant believed the movement unnecessarily sapped Federal resources, and it was one of the reasons he eventually relieved McClernand on June 18, 1863, during the Vicksburg siege. (Map Graphics © DFL Group 2019)