Major Leroy Eltinge delivered a speech on the use of cavalry on this day, in 1917.
Major Eltinge had commanded an element of the 8th Cavalry in Mexico, so this speech was delivered hard on the heels of his recent experiences. He was a career Army officer, in the service since 1896 who would go on to rise to the brevet rank of Brigadier General as Deputy Chief of Staff of the AEF during World War One before reverting to his permanent rank of Major following the war. He'd re-obtain the rank of Brigadier General in 1924 and died while still a serving officer during World War Two.
A ship that served in World War Two was named in his honor.