Enjoyable flight of fancy, the course of the Second World War is thrown to the wind by the sudden appearance of a UN Task Force among the Midway attack force. There are strong shades of Turtledove in the Axis of Time series, in as much as the story progresses through vignettes of a number of characters experiences, but I don't think he pulls off the characterisations as well. The scenes consist of characters much higher up the chains of command as well, which in this case works quite well, but primarily this is a book of boys and their toys. It's pretty much an expression of the huge increase in the lethality of hardware nearly a hundred years on. 
 The social problems that integration of women and coloured servicemen and officers in the modern forces are introduced but are left to later books to explore. 
 All in all a rattling good read.