Spetznaz

SPETZNAZ is the Russian special forces, similar in theory to British SAS. While today it is broadly applied to most of Russia's special forces, the SPETZNAZ usually referenced in the Metal Gear series is the SPETZNAZ GRU or Russian army special forces. They have created a fierce reputation as one of the best special forces in the world today due to the very harsh standards of their training and are controlled by the GRU.

In Metal Gear series

 * Revolver Ocelot and his Ocelot Unit are SPETZNAZ
 * Sergei Gurlukovich was former head of SPETZNAZ. He worked in GRU which is where he met Ocelot.
 * When Solid Snake first meets Sergei's daughter, Olga, he asks if she is SPETZNAZ.