Cold War espionage describes the intelligence gathering activities during the Cold War between NATO and the Warsaw Pact. Because each side was preparing to fight the other, intelligence on the opposing side's intentions, military, and technology was of paramount importance. To gather this information, the two relied on a wide variety of military and civilian agencies. While several such as the CIA and KGB became synonymous with Cold War espionage, many other organizations played key roles in the collection and protection of the secction concerning detection of spying, and analysis of a wide host of intelligence disciplines.