The Soul of ArmiesFor both the United States and United Kingdom counterinsurgency was a serious component of security policy during the Cold War and, along with counterterrorism, has been the greatest security challenge after September 11, 2001. In The Soul of Armies, Austin Long compares and contrasts counterinsurgency operations during the Cold War and in recent years by three organizations: the US Army, the US Marine Corps, and the British Army. Long argues that the