Sioux Uprising - 1862

Hello, I have been gather information regarding the 1862 Sioux Uprising (Dakota War) & it's connection to settlers who came from Norway in the 1850's. See link for information on the 150th Aniversary: http://www.startribune.com/local/138264074.html One of the settlers (Anders Olsen / Olson Bekkedok / Bækkedok 1828-1862) was killed & scalped in the conflict. See the following links for this individual: http://www.geni.com/people/Anders-Bekkedok/6000000002341810428 http://forum.arkivverket.no/topic/178294-anders-olsen-bckkedok-1828-1862-killed-in-sioux-uprising/ http://www.findagrav...&GRid=40416710 http://www.findagrav...&GRid=34127305 http://digitalarkive...ostnr=216#nedre Anders Olsen & Larine Maria Syversd. married on 26 April, 1853 http://digitalarkivet.no/cgi-win/webcens.exe?slag=visbase&sidenr=1&filnamn=vi06241838&gardpostnr=1053#nedre but this is after his documented date of 7 April, 1853, in the Kongsberg departure for America http://www.arkivverket.no/URN:kb_read?idx_kildeid=1098&idx_id=1098&uid=ny&idx_side=-410 but the marriage states: "Han attest 7/4 53 fra Kongsberg" - which is the same date as the departure...curious. Can it be determined what the ship & departure date actually was? Others from the same area in Norway who came in the 1850’s to the same area & were effected by the Uprising were: http://www.geni.com/people/Ole-Amundson/6000000011335793491 http://www.geni.com/people/Amos-Amund-Nelson/6000000009168818606 http://www.geni.com/people/Mads-Olson/6000000009178471586 http://www.geni.com/people/Ivar-Jackson/6000000009178553139 Many thanks for your help in advance, Dale Nelson (Minnesota)