Final answer:
The tactic of constant firing on territory as a form of intimidation and to instill fear is known as a strategy of terror, commonly seen in various forms of warfare including the Ku Klux Klan's raids, U.S. strategies in Vietnam, and attrition warfare during the First World War, as well as Mongol battlefield tactics under Genghis Khan.
Step-by-step explanation:
The tactic of constant firing on territory to let them know they were being attacked is commonly referred to as a strategy of terror or intimidation. This tactic has been employed throughout history in various forms, aiming to strike fear in the enemy and break their will to resist.
An example of such a tactic can be seen with the Ku Klux Klan's nighttime raids, firing into homes to intimidate and threaten occupants. Alternatively, armies have used relentless shelling or bombardment to create a similar effect, as was common in some 20th-century conflicts, such as the strategies used in Vietnam by the U.S. under General Westmoreland who employed superior firepower to force the enemy into surrender.
A different approach to applying pressure on the enemy without direct confrontation is the use of attrition warfare, where the objective is to outlast the enemy by inflicting more losses than they can recover from or withstand. This tactic was prominent during the First World War, where commanders sought to exhaust the enemy's resources and manpower. The Mongol tactics under Genghis Khan can also be seen as a form of psychological warfare, using trickery and surprise attacks to demoralize the enemy and create an atmosphere of fear and uncertainty.