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Sinking hit British battlecruiser 'Indefatigable' shortly before its explosion on May 31st, 1916 - tempera painting by Willy St?wer 1916. (Willy St?wer/ullstein bild via Getty Images)

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Members of the 3rd U.S. Infantry Regiment place American flags at the graves of U.S. soldiers buried in Section 60 at Arlington National Cemetery in preparation for Memorial Day May 24, 2012 in Arlington, Virginia. (Win McNamee/Getty Images)

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Soldiers in the 1st Infantry Division wait outside at a deployment ceremony as more soldiers at Fort Riley prepare to leave for another tour in Iraq August 13, 2009 at Fort Riley, Kansas. (Chris Hondros/Getty Images)

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(Adrianna Williams/Getty Images)