The first major <a href="https://en.wikipedia.org/wiki/Wagon_train" id="mwhg" rel="mw:WikiLink" title="Wagon train">wagon train</a> heading for the <a href="https://en.wikipedia.org/wiki/Pacific_Northwest" id="mwhw" rel="mw:WikiLink" title="Pacific Northwest">Pacific Northwest</a> sets out on the <a href="https://en.wikipedia.org/wiki/Oregon_Trail" id="mwiA" rel="mw:WikiLink" title="Oregon Trail">Oregon Trail</a> from <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Elm_Grove,_Missouri" id="mwiQ" rel="mw:WikiLink" title="Elm Grove, Missouri">Elm Grove, Missouri</a>, with 100 pioneers.<sup about="#mwt71" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-11"}}' id="cite_ref-11" rel="dc:references" typeof="mw:Extension/ref"><a href="./May_16#cite_note-11" id="mwig" style="counter-reset: mw-Ref 11;"><span class="mw-reflink-text" id="mwiw">[11]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-11"><cite about="#mwt62" class="citation book cs1" id="CITEREFDickenDicken1979">Dicken, Samuel N.; Dicken, Emily F. (1979). <i id="mwBuk">The Making of Oregon: A Study in Historical Geography</i>. Portland, Ore.: Oregon Historical Society. p.<span id="mwBuo" typeof="mw:Entity"> </span>72. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwBus" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwBuw" typeof="mw:Entity"> </span><a href="./Special:BookSources/9780875950631" id="mwBu0" rel="mw:WikiLink" title="Special:BookSources/9780875950631"><bdi id="mwBu4">9780875950631</bdi></a></cite><span about="#mwt62" class="Z3988" id="mwBu8" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+Making+of+Oregon%3A+A+Study+in+Historical+Geography&amp;rft.place=Portland%2C+Ore.&amp;rft.pages=72&amp;rft.pub=Oregon+Historical+Society&amp;rft.date=1979&amp;rft.isbn=9780875950631&amp;rft.aulast=Dicken&amp;rft.aufirst=Samuel+N.&amp;rft.au=Dicken%2C+Emily+F.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMay+16"></span>; <link about="#mwt65" data-mw='{"name":"templatestyles","attrs":{"src":"Module:Citation/CS1/styles.css"},"body":{"extsrc":""},"parts":[{"template":{"target":{"wt":"cite book","href":"./Template:Cite_book"},"params":{"last":{"wt":"Byers"},"first":{"wt":"Roland O."},"title":{"wt":"The Linchpin: The Oregon Trail in 1843"},"location":{"wt":"Moscow, Idaho"},"publisher":{"wt":"University Press of Idaho"},"date":{"wt":"1984"},"isbn":{"wt":"9780893010942"},"page":{"wt":"22"},"postscript":{"wt":"none"}},"i":0}}]}' href="mw-data:TemplateStyles:r1215172403" id="mwBvA" rel="mw-deduplicated-inline-style" typeof="mw:Extension/templatestyles mw:Transclusion"/><cite about="#mwt65" class="citation book cs1" id="CITEREFByers1984">Byers, Roland O. (1984). <i id="mwBvE">The Linchpin: The Oregon Trail in 1843</i>. Moscow, Idaho: University Press of Idaho. p.<span id="mwBvI" typeof="mw:Entity"> </span>22. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwBvM" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwBvQ" typeof="mw:Entity"> </span><a href="./Special:BookSources/9780893010942" id="mwBvU" rel="mw:WikiLink" title="Special:BookSources/9780893010942"><bdi id="mwBvY">9780893010942</bdi></a></cite><span about="#mwt65" class="Z3988" id="mwBvc" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=The+Linchpin%3A+The+Oregon+Trail+in+1843&amp;rft.place=Moscow%2C+Idaho&amp;rft.pages=22&amp;rft.pub=University+Press+of+Idaho&amp;rft.date=1984&amp;rft.isbn=9780893010942&amp;rft.aulast=Byers&amp;rft.aufirst=Roland+O.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMay+16"></span>; <link about="#mwt68" data-mw='{"name":"templatestyles","attrs":{"src":"Module:Citation/CS1/styles.css"},"body":{"extsrc":""},"parts":[{"template":{"target":{"wt":"cite book","href":"./Template:Cite_book"},"params":{"last":{"wt":"Manwelleer"},"first":{"wt":"Mathew"},"title":{"wt":"Chronology of the U.S. Presidency"},"location":{"wt":"Santa Barbara, Calif."},"publisher":{"wt":"ABC-CLIO"},"date":{"wt":"2012"},"isbn":{"wt":"9781598846454"},"url":{"wt":"https://books.google.com/books?id=uqB3ehA7M0oC"},"page":{"wt":"315"}},"i":0}}]}' href="mw-data:TemplateStyles:r1215172403" id="mwBvg" rel="mw-deduplicated-inline-style" typeof="mw:Extension/templatestyles mw:Transclusion"/><cite about="#mwt68" class="citation book cs1" id="CITEREFManwelleer2012">Manwelleer, Mathew (2012). <a class="external text" href="https://books.google.com/books?id=uqB3ehA7M0oC" id="mwBvk" rel="mw:ExtLink nofollow"><i id="mwBvo">Chronology of the U.S. Presidency</i></a>. Santa Barbara, Calif.: ABC-CLIO. p.<span id="mwBvs" typeof="mw:Entity"> </span>315. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwBvw" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwBv0" typeof="mw:Entity"> </span><a href="./Special:BookSources/9781598846454" id="mwBv4" rel="mw:WikiLink" title="Special:BookSources/9781598846454"><bdi id="mwBv8">9781598846454</bdi></a>.</cite><span about="#mwt68" class="Z3988" id="mwBwA" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Chronology+of+the+U.S.+Presidency&amp;rft.place=Santa+Barbara%2C+Calif.&amp;rft.pages=315&amp;rft.pub=ABC-CLIO&amp;rft.date=2012&amp;rft.isbn=9781598846454&amp;rft.aulast=Manwelleer&amp;rft.aufirst=Mathew&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DuqB3ehA7M0oC&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AMay+16"></span></span>