World War I | American Institute of Physics
Belgian steel helmet | NZHistory, New Zealand history online
French Adrian Helmet | National Museum of African American History and Culture
Eleven Artifacts of Heroism from America's Wars | At the Smithsonian| Smithsonian Magazine
What it means to 'throw your hat in the ring' - AOPA
The Evolution of the Hard Hat - The New York Times
Bashford Dean and the Development of Helmets and Body Armor during World War I | Essay | The Metropolitan Museum of Art | Heilbrunn Timeline of Art History
Military helmets - an introduction | Australian War Memorial
How a WWI war helmet outperformed modern gear in a new study | PBS NewsHour
Collections (Northwest Museum of Arts + Culture)
Amazon.com: WWI Italian M1909 Field Cap. Replica Customize Colour and Number as Well Green, 7 1/4 : Clothing, Shoes & Jewelry
John Leopold Brodie (1873-1945) - Mark 1 steel helmet
Amazon.com : WW1 US M17 Helmet - American Military Army Steel Cotton Lined Reproduction (Medium (56/57 cm)) : Sports & Outdoors
The cause of World War One! Origins: Rap Battle | WW1 Uncut - BBC - YouTube
German Helmet - Cork City Council
National Museum of the Marine Corps - Artifact Highlight - WWI 2d Division Helmet circa 1918 This M1917 helmet belonged to Marine Arthur E. Lyng. Lyng was a Navy Cross and Distinguished
5 Real-Life WWI Artifacts As Depicted In Netflix's "All Quiet on the Western Front" | National WWI Museum and Memorial
The Australian Imperial Force (AIF) headwear 1914-1918 | Australian War Memorial
World War I 55th U.S. Engineers Painted Helmet | Antiques Roadshow | PBS
The Evolution of the Hard Hat - The New York Times
WW1 German Prussian Army Leib-Grande Husaren Regiment Officers Visor Hat Cap Rep Red Blue, Blue,red, 7 1/4 at Amazon Men's Clothing store
Stahlhelm, German helmet - Musée de la Grande Guerre
Adrian helmet - Wikipedia
WWI U.S. Army Protective Helmet Used by American Rocket Society | National Air and Space Museum
Combat helmet from World War I used by the 93rd Infantry Division | National Museum of African American History and Culture
