The Oregon Historical Society will open a new exhibit, World War II: A World at War, A State Transformed, on Friday, June 26. The exhibit presents the war through artifacts and manuscripts on loan from the Portland-based Mark Family Collection, including a very rare Nazi Enigma machine, the military uniforms of Gen. George Patton and Dwight D. Eisenhower, the only copy of the Atlantic Charter personally signed by Winston Churchill and Franklin Roosevelt, and a life preserver from the U.S.S. West Virginia, which was sunk at Pearl Harbor. The exhibit will be on display through Dec. 7. More information.