Future at War Vol 2

I read this book, along with its two sequels, over 20 years ago and was greatly impressed by its scholarship. The stories selected all had a pertinent point to make about the future of war for man. This first volume dealt with future war on earth. It included stories such as "The Man in the Gray Weapons Suit (future air combat)," "A Scenario for the Fall of Night (A successful Soviet invasion of the US in the 1990s)" and "The Screwfly Solution (Alien invaders use a unique biological warfare solution to rid Earth of those pesky humans). Well developed and insightful in its day, and still a good read for those who like military science fiction.