Lost Time: The Legend of Garison Fitch - Book 3

The year is 1947 and two pilots flying for the Republic of Texas in WW2 are pulled from the front lines to test an experimental aircraft that will end the war. Their test flight takes them 5000 years in the future, to a desolate wasteland with no signs of human life. When they return to 1947 the war is over and the Republic is gone!