Airlords of Han is the 2nd Buck Rogers story, the sequel to Armageddon 2419 A.D.. Anthony Rogers takes the fight to free 25th Century America to the Han overlords. From the March, 1929 issue of Amazing Stories.

Elsewhere I have set down, for whatever interest they have in this, the 25th Century, my personal recollections of the 20th Century. Now it occurs to me that my memoirs of the 25th Century may have an equal interest 500 years from now—particularly in view of that unique perspective from which I have seen the 25th Century, entering it as I did, in one leap across a gap of 492 years. This statement requires elucidation. There are still many in the world who are not familiar with my unique experience...