An Overview of Intelligence What Is Intelligence? The Challenge of Defining Intelligence Information and Intelligence Types of Intelligence Functions of Intelligence Agencies Policymakers and Decision-Makers Intelligence Foundations in U.S. Government U.S. Intelligence Community Purpose of Intelligence Limitations of Intelligence History of Intelligence in the United States Revolutionary War to Civil War Civil Warto World War I Law Enforcement Intelligence: The Palmer Raids World War I to Pearl Harbor World War II The Cold War National Security Act of 1947Early Days of the CIA Korean War Crea.Abstract: An Overview of Intelligence What Is Intelligence? The Challenge of Defining Intelligence Information and Intelligence Types of Intelligence Functions of Intelligence Agencies Policymakers and Decision-Makers Intelligence Foundations in U.S. Government U.S. Intelligence Community Purpose of Intelligence Limitations of Intelligence History of Intelligence in the United States Revolutionary War to Civil War Civil War to World War I Law Enforcement Intelligence: The Palmer Raids World War I to Pearl Harbor World War II The Cold War National Security Act of 1947Early Days of the CIA Korean War Crea