U-boats caused havoc in World War Two during the Battle of the Atlantic. U-boats were so damaging that Winston Churchill commented that it was the only time in World War Two that he thought Britain would have to contemplate surrendering.
A soldier equips an elephant-mounted machine gun during WWI. I chose this pin because i thought it was interesting. In WWI i have heard of horses and dogs being used but not elephants. Especially elephants mounted with machine guns.
The USS Oklahoma is pulled upright after capsizing due to damage during the Japanese attack on Pearl Harbor Dec Unfortunately, despite all the efforts to raiser her, she ultimately rolled over and sank.
The war is over and US forces are being demobilized back to peacetime status. Here, 52 submarines and 4 submarine tenders of the US Navy Reserve Fleet rest in Mare Island Naval Shipyard, California, circa Jan
The rarely seen back of the Hoover Dam before it filled with water 1936 - On March the Hoover Dam was completed. More than people were employed by six Companies to construct the dam. Construction began in 1931 and over 100 workers died.
Quite possibly the greatest hat worn during the Great War .Generalfeldmarschall August von Mackensen, officer in the German Army. Wearing the Totenkopf (skull and cross bones) which was part of German military gear since the century.
Veicoli is an amazing photograph of German vehicles attempting to escape from the closing noose of the Allied armies. They are attempting to cross one of the remaining bridges outside of Aachen in This photo was taken by an American recon plane.