George Platt was probably living in Connecticut by the early 1860s. He enlisted in the Union army on August 26, 1861, and he mustered in as a private in Company E of the 7th Connecticut Infantry on September 7. The regiment took part in the siege of Charleston and the siege of Petersburg. In September 1862, he declared his support for conscription, writing that “if the men are not willing to come now, draft them. we have wated long enough for them.” He blamed the country’s politicians for prolonging the war, writing that the “war is to[o] much of a money makeing affare.”
He was wounded in the Battle of Olustee in February 1864, and he mustered out on September 12, 1864. Platt returned to Connecticut after the war. He applied for a federal pension in March 1881 and eventually secured one. He died sometime after 1881.