What type of details about john alexander mcclernand can be gathered from the following bio? Bio: john alexander mcclernand -lrb- may 30 , 1812 -- september 20 , 1900 -rrb- was an american lawyer and politician , and a union general in the american civil war . he was a classic case of the politician-in-uniform coming into conflict with career army officers , graduates of the united states military academy . he was a prominent democratic politician in illinois and a representative in the u.s. congress before the war and then served as a subordinate commander under ulysses s. grant in the western theater , fighting in the battles of belmont , fort donelson , and shiloh in 1861 -- 62 . a close friend and political ally of abraham lincoln , mcclernand was given permission to recruit a force to conduct an operation against vicksburg , mississippi , which would rival the effort of grant , his department commander . grant was able to neutralize mcclernand 's independent effort after it conducted an expedition to win the battle of arkansas post , and mcclernand became the senior corps commander in grant 's army for the vicksburg campaign in 1863 . during the siege of vicksburg , grant relieved mcclernand of his command for his intemperate and unauthorized communication with the press , finally putting an end to a rivalry that had caused grant discomfort since the beginning of the war . mcclernand left the army in 1864 and served as a judge and a politician in the postbellum era .
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