This section includes materials related to the key moments of the 1920s, 1930s, and 1940s. The Roaring Twenties gave way to the worst financial crisis of the century, which led to the New Deal policies and programs of the federal government, followed by World War II.
Oral history interviews
Conducted with people who lived during the Great Depression.
Issues of The Organizer
The newsletter published by the General Drivers Local 574 of the Teamsters Union during a strike in the 1930s.
Civilian Conservation Corps (C.C.C.) tree planting crew
C.C.C. crew fighting forest fires on Isle Royale
C.C.C. crew building the Cascade River State Park bridge
Lima Mountain lookout cabin built by the C.C.C. in 1936
Road work with C.C.C. bulldozer
Certificate of Discharge from the C.C.C.
Works Progress Administration (W.P.A.) workers on a construction project in Lincoln County
W.P.A. crew removing snow in Virginia
W.P.A. workers building projects in Grand Marais
Murals at the Duluth Zoo painted by the W.P.A.
Blueprints for the Wyoming grade school W.P.A. project built in 1938
Videos showcasing W.P.A. projects at Camp Ripley
The Story of W.P.A. in the Minneapolis Parks, Parkways and Playgrounds books
Oral history interviews conducted by W.P.A. workers in Crow Wing County
Ira Weil Jeffery from Minneapolis, killed at Pearl Harbor
Portraits of soldiers from Kanabec County
Female Duluth Missabe and Iron Range Railway workers during World War II
U.S. Navy Pre-Flight School at St. Olaf College
Cold Spring Granite Company wartime manufacturing
World War II Veterans oral history collection
From Berman Upper Midwest Jewish Archives.
World War II Veterans oral history collection
From St. Cloud State University.
Letters to and from Henry Peterson
Peterson utilized German Prisoner of War labor at his farm during WWII.
V-Mail Letters to Columbia Heights newspaper
Written by soldiers abroad to their community back home
Minnesota History Timeline, Part 2
Part 2 of this timeline explores significant moments in the history and development of Minnesota from 1900 to 2020.
Primary Source Sets:
CCC Camps in Minnesota map
Explore this map to view a selection of Minnesota's 148 Civilian Conservation Corps work relief camps.
War Stories: World War II exhibit
Meet some Minnesotans who joined the world in a fight against oppression and tyranny.

The Minnesota Digital Library (MDL) supports discovery and education through free access to unique digital collections shared by cultural heritage organizations from across the state of Minnesota. Our contributors include libraries, historical societies, museums, and archives. Begun in 2003, MDL includes digital content from over 200 participating organizations from across the state. Together we have digitized more than 60,000 photographs, postcards, maps, documents, letters, oral histories, and much more. These materials are available online in a free searchable database.
For more tips about teaching with MDL, visit our website or contact MDL staff.