After serving in the U.S. Army from Jan. 1945 to Dec. 1946 (his tour of duty being Okinawa)
Sources
"North Dakota Census, 1925," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QK9C-4T3L : 18 July 2016), Waldo Morken in household of John Morken, Eagle, Richland, North Dakota, United States; citing sheet number 8, family number 68, State Historical Society of North Dakota; FHL microfilm 1,731,403.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XKV6-B93 : accessed 1 September 2017), Waldo A Morken in household of John J Morken, Eagle, Richland, North Dakota, United States; citing enumeration district (ED) ED 17, sheet 3A, line 37, family 46, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1741; FHL microfilm 2,341,475.
"United States World War II Army Enlistment Records, 1938-1946," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:K8PK-7SP : 5 December 2014), Waldo A Morken, enlisted 17 Jan 1945, Dawson, Minnesota, United States; citing "Electronic Army Serial Number Merged File, ca. 1938-1946," database, The National Archives: Access to Archival Databases (AAD) (http://aad.archives.gov : National Archives and Records Administration, 2002); NARA NAID 126323, National Archives at College Park, Maryland.