In 1918, the Army Signal Corps had some of the few-fangled "moving picture" cameras embedded at Chateau-Thierry and Belleau Wood. Now via the incredible Internet Moving Image Archive. Tanks, Artillery, Doughboys, german prisoners. Oh yeah, General Pershing, too.
It needs some sort of piano accompanyment to give it that old theater feel, but if this is your bag, baby, then you should take a look.