Now there are two foreign intelligence services: SVR and GRU. The first one is the Russian Foreign Intelligence Service. It is the former First Chief Directorate of the Soviet era KGB, which has managed most foreign intelligence operations for decades. Its activities are well known throughout the world.
The second one is the GRU, Russian military intelligence. It is a part of the Defense Ministry. Its full name is much longer (The Chief Intelligence Directorate of the General Staff of the Russian Army). GRU has retained its Soviet era name, and just about everything else. GRU is seen as a living relic of the Soviet times. That is why GRU is so much more secretive than the “Westernized” SVR. GRU officers are considered more patriotic (and old school) than those of the SVR. During the Cold War, there were fewer GRU defectors, still a point of pride in the GRU. GRU prefers to stay in the shadows. Western writers have not written many books about GRU, compared to the KGB. This is largely because GRU keeps its secrets better, and, in the West, is considered an obscure part of Russian intelligence. It’s possible that the GRU activated these sleepers, but for the moment the Germans aren’t talking.
Both GRU (Russian Military Intelligence) and SVR (Russian Foreign Intelligence Service) perform the same functions: Political Intelligence, Scientific and Technical Intelligence (industrial espionage) and Illegal Intelligence. Because of this, the two agencies have a very real rivalry going.
But there was, and remains, one area where only the SVR (and its predecessor, the KGB) participates; running counter-intelligence abroad. This was long a KGB monopoly because it was the KGB’s job to make sure the armed forces remained loyal, and GRU was, and is, very much a part of the armed forces.
Thus when the GRU officers are working abroad, they are monitored by Directorate “K” (counter-intelligence) of the SVR. Those who serve inside Russia are watched by the Directorate of Military Counter-Intelligence (The Third Directorate) of the FSB (Federal Security Service, inheritor to the KGB). Interestingly, in the Soviet period, it was also called the Third Directorate. It is not a coincidence but a continuation of the Soviet tradition. The Third Directorate of the FSB is still assigned to monitor the Defense Ministry, of which the GRU is a part. The head of GRU does not even report directly to the Russian President. GRU reports have to go through the Head of the General Staff and the Defense Minister before reaching the top man. Thus GRU is very much number two in the Russian foreign intelligence business. As Number 2, they tend to try harder, and consider themselves more elite than those wimps over at SVR.
On the other hand, there also is one function monopolized by the GRU; battlefield intelligence. The battlefield intelligence is run in peacetime as well. For example, in preparation for future wars, the GRU sets up illegal weapon and ammunition dumps in the territory of many foreign countries. This is a risky operation. It usually involves groups of junior Russian diplomats secretly going into rural areas to bury rifles, machine-guns and other weapons. They have to do this discreetly and in a hurry, to avoid detection by the local counterintelligence service. It is considered a hard job.