Blanchet was ordained bishop on 27 September 1846 by Archbishop Ignace Bourget at Saint-Jacques Cathedral in Montreal . He left for Oregon on 4 March 1847 and arrived in Walla Walla on 5 September . The killing of Protestant missionaries in the Whitman massacre on 29 November 1847 led to an uneasy relationship among Blanchet , the native Cayuse people , and the United States government , and as a result Blanchet retreated to St. Paul in the Willamette Valley
Whitman massacre
Whitman massacre
Augustin-Magloire Blanchet