When the Korean War began in June 1950, the United States Air Force's Air Rescue Service was a fledgling organization possessing a variety of aircraft types, most having seen service during World War II. The concept of using helicopters and amphibious fixed-wing aircraft to rescue airmen downed behind enemy lines or in hostile waters had gained little consideration by the Air Force and was largely unproven. But by the fall of 1950 the 3d Air Rescue Squadron had begun to write a new chapter in the history of air power, and by July 1953, when the armistice was signed in Korea, air rescue had become established as an integral part of U.S. fighting forces. Although the H-5 and H-19 helicopters and SA-16 amphibians gained attention worldwide by virtue of countless daring rescues per- formed throughout the war, lesser known aircraft such as the L-5, SC-47, SB-17, and SB-29 also played important roles in building the U.S. Air Force's overall air rescue capability in the Korean War theater.

Although the United States won the race to the moon, the Soviets were far more active in space than Americans during the decade that followed. By the 1980s, some space experts feared the United States was in danger of being surpassed in space, including dual-use systems that might be employed offensively in a military confrontation. A few experts, looking ahead, recommended a space force within roughly two decades. Standing up Space Force is organized chronologically by presidential administration, beginning in the middle of the Clinton years and progressing through the Trump administration. During the Clinton and George W. Bush years, the move to national security space was incremental. The Obama presidency witnessed the rise of NewSpace entrepreneurs whose impressive space activities facilitated their initial partnering with  U.S. government National Security Space (NSS) missions helping the United States keep pace with China and Russia. During the Trump administration, all necessary elements finally came together – most significantly, presidential-congressional leadership and bipartisan support – to eventually produce the fiscal 2020 national defense authorization act (NDAA). Because the NDAA authorized and provided for the Space Force, when the President signed the defense bill on 20 December 2019, at the same moment he officially established the nation’s sixth armed service.

From the 1920s Afghanistan maintained a small air arm that depended heavily upon outside assistance. Starting in 2005, the United States led an air advisory campaign to rebuild the Afghan Air Force (AAF). In 2007 a formal joint/combined entity, led by a U.S. Air Force brigadier general, began air advisor work with Afghan airmen. Between 2007 and 2011, these efforts made modest progress in terms of infrastructures, personnel and aircraft accessions, and various training courses. But by 2010, advisors increasingly viewed AAF command and control (C2) as a problem area that required significant improvement if a professional air force was to be built. In the spring of 2011, major institutional changes to AAF C2 procedures were being introduced when nine U.S. air advisors were killed. The attack was the worst single-incident loss of U.S. Air Force personnel in a deployed location since 1996 and the worst insider-attack since 2001. From the day of that tragic event, the cultural chasm between Afghanistan and the West became more apparent. This dilemma continues with no end in sight to an air advisory mission of uncertain long-term value.