Envelopment

According to the United States Army there exist four types of envelopment:

• A flanking maneuver or single envelopment consists of one enveloping force attacking one of the enemy's flanks. This is extremely effective if the holding forces are in a well defensible spot (e.g., Alexander the Great's hammer and anvil at the Battle of Issus) or if there is a strong, hidden line behind a weak flank (e.g. Battle of Breitenfeld (1631) and Battle of Rocroi).
• A pincer movement or double envelopment consists of two simultaneous flanking maneuvers. Hannibal devised this strategy in his tactical masterpiece, the Battle of Cannae. Later on, the Rashidun Caliphate General Khalid ibn al-Walid applied the maneuver in a decisive battle against the Sassanid Empire during the Battle of Walaja. In 1940 and 1941, in World War II, the Germans repeatedly employed this tactic to encircle hundreds of thousands of enemy troops at once, namely in the Battle of France and in Operation Barbarossa against the USSR.
• An encirclement whereby the enemy is surrounded and isolated in a pocket. The friendly forces can choose to attack the pocket or invest it (to stop resupplies and to prevent breakouts) and wait for a beleaguered enemy to surrender.
• A vertical envelopment is "a tactical maneuver in which troops, either air-dropped or air-landed, attack the rear and flanks of a force, in effect cutting off or encircling the force".

A special type is the cabbage tactics that has been used by the Chinese Navy around disputed islands. Its goal is to create a layered envelopment of the target.