Long ago, there was a group called the KGB. 
The KGB was a big group in a land called the Soviet Union. 
They worked to find out what other lands were doing. 
Sometimes, the group tried to change things in other lands. This was a very serious part of their work. They used secrets to try to stay in control.
Later, the Soviet Union changed. The KGB went away in 1991. 
The KGB was the main security group for the Soviet Union. It worked from 1954 to 1991. 
KGB agents worked to find secrets from other countries. This is called foreign intelligence. They also watched people inside their own country. They wanted to stop any groups that tried to change the government. 
In other lands, the KGB tried to stay in control. For example, they worked to stop movements in Hungary and Czechoslovakia. 
In the United States, the KGB tried to find secrets too. They looked for new science and technology. In the 1960s, a man named John Walker helped them. He gave them many messages from the US Navy.
In 1991, the Soviet Union fell apart. The KGB was dissolved on December 3, 1991. New groups in Russia took over their old jobs.
The KGB was the main security agency for the Soviet Union. It worked from 1954 until 1991. 

To do its work, the KGB followed many steps. They guarded the borders of the Soviet Union. They also protected the leaders of the government. The agency worked to keep government communications safe. They also looked for people who disagreed with the government. This included stopping groups that wanted to separate from the state. 
The history of the KGB began after changes in the Soviet government. It was formed in March 1954 under a leader named Ivan Serov. Before this, other agencies like the NKVD and OGPU did similar work. Leaders like Leonid Brezhnev later had a big impact on the group. Brezhnev took power in 1964. He was careful about how much power the spy chiefs had. He even removed leaders like Vladimir Semichastny from their jobs. 
KGB agents often tried to find secrets in other countries. In the United States, they looked for scientific and technical information. They wanted to learn about things like radar and jet engines. During the Second World War, they even tried to find atomic secrets. One famous case involved a young physicist named Theodore Hall. In 1967, a Navy officer named John Walker helped them too. He gave the KGB about one million US Navy messages over eighteen years. 
The KGB also worked to keep control in other lands. They tried to stop movements in Hungary in 1956. They also worked to stop the Prague Spring in Czechoslovakia in 1968. In that case, they used spies disguised as tourists to gather information. They even tried to influence elections in Bangladesh during the 1970s. Finally, the Soviet Union fell apart in 1991. The KGB was officially dissolved on December 3, 1991. 
The Committee for State Security, known as the KGB, was the primary security agency of the Soviet Union. It operated from 1954 until 1991. 
To carry out its mission, the KGB performed many specific functions. It guarded the state borders of the USSR and protected Soviet leadership. The agency worked to preserve the security of government communications. It also engaged in operative-investigative activities. A major part of its work involved combating dissent and separatism within Soviet society. This meant finding and stopping people who disagreed with the government or wanted to break away. In the Soviet Bloc, the KGB extensively monitored both public and private opinions. They looked for "harmful attitudes" or "hostile acts" that might threaten Communist rule. 
The history of the KGB is tied to shifts in Soviet leadership. It was formed in March 1954 under Ivan Serov. This happened after restructuring in the MVD following the fall of Lavrentiy Beria in 1953. The KGB was the direct successor to older agencies like the Cheka, OGPU, and NKVD. Later, Leonid Brezhnev became a powerful figure in the agency's history. Brezhnev took power in 1964 after a coup d'état. He was concerned about the power of ambitious spy chiefs. Because of this, he removed leaders like Vladimir Semichastny from their positions. In the 1980s, the policy of glasnost led to tension. KGB Chairman Vladimir Kryuchkov led a failed coup in August 1991. This attempt to depose President Mikhail Gorbachev helped lead to the collapse of the USSR. The KGB was officially dissolved on December 3, 1991.
During the Cold War, the KGB focused heavily on foreign intelligence. In the United States, they sought scientific and technological secrets. They were interested in advances in radar, jet propulsion, and encryption. During the Second World War, they even targeted atomic secrets. For example, physicist Klaus Fuchs was a main agent in a spy ring. In 1944, a 19-year-old Harvard physicist named Theodore Hall helped the New York City residency. 
The KGB also used its power to influence politics in other countries. In 1956, the KGB helped crush the Hungarian Revolution. In 1968, it played a major role in stopping the Prague Spring in Czechoslovakia. To stop the Prague Spring, the KGB used illegal residents disguised as Western tourists. These spies gathered information on supporters of Alexander Dubček's government. They also planted evidence to justify a Soviet invasion. 
The agency used various "active measures" to achieve its goals. One method was disinformation, which involves spreading false information to discredit enemies. They also used sabotage operations and recruited former German intelligence officers. In the 1970s, the KGB tried to buy three banks in northern California. They wanted to use these banks to access high-technology secrets. The banks were Peninsula National Bank, First National Bank of Fresno, and Tahoe National Bank. They used the Moscow Narodny Bank and a businessman named Amos Dawe to try this. However, the CIA eventually thwarted these efforts.
Today, the KGB no longer exists, but its legacy continues through new agencies. In Russia, the KGB was succeeded by the Foreign Intelligence Service (SVR) and the Federal Security Service (FSB). 
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