The Cold War began in 1945 and was the beginning of an intense post-World War II standoff between two world powers, the United States of America and the Soviet Union . They had just concluded a war in which they were allies fighting against the Germans, Italians and Japanese. This prompted the use of both countries' intelligence agencies. The Soviets relied on the KGB to gather intelligence on internal and external situations, and began as a secret police before transforming into their main intelligence agency in 1954. The United States had all of its intelligence coming from the CIA, founded in 1947. after President Truman decided that the United States needed an agency like theirs. Both the CIA and the KGB were gathering intelligence on the opposing nation in terms of scientific capabilities and advancements. They were the two main actors in this war because they were the ones who discovered the “secrets” their countries needed. The KGB and CIA were competing with each other to uncover more secrets about each other faster. According to K. Lee Lerner the KGB, “… was the main Soviet intelligence agency and the Soviet equivalent of the American CIA.” During this time, it was a race to see who could have the biggest and best arsenal. So the CIA and KGB were given the task of finding out what the opposing nation's scientific advances and capabilities were. K. Lee Lerner puts it in better perspective: "The KGB and Western intelligence services played a continuous deadly game of 'cat and mouse' (both as pursuer and as persecuted) throughout the Cold War." That's how intense it got between both sides. Phillip Knightley clearly defines the main objectives of each part; “The purpose of each was to steal the secret…half of the paper…that they were carrying out spy missions, in other countries, which caused a big problem because they then lacked the “power” to “fight” the devil enemy. The KGB and the CIA operated in similar ways and never worked together during this period. Soon after the completion of World War II, the United States and the Soviets entered into another war and the mid-1970s. There was also a battle within the larger battle, fighting the smaller one. The Soviet KGB and the American CIA, each country's main intelligence branches, fought each other fiercely for dominance over the world. 'other. It is actually an important part of the Cold War because without this part of each country's military none of the things that happened could have happened. The above evidence proves that my hypothesis is correct and many would agree with me.