[DeepL Translation - needs review] Volume 1 Introduction: On his 75th birthday, John Perry visited his late wife's grave and then joined the military. He joined the Colonial Defense Forces, which only allows men and women over 75 to join, on the condition that they can never return to Earth. The Colonial Defense Forces are engaged in a fierce war against aliens who are completely different in appearance and thought from the human race, which has begun colonizing various planets in the galaxy...
