Answer:
Blitzkreig or lightning war
Step-by-step explanation:
Blitzkreig or lightning war, is the popular name that receives a military attack tactic that involves an initial bombardment, followed by the use of mobile forces attacking with speed and surprise to prevent an enemy from carrying out a coherent defense. The basic principles of this type of operation were developed in the twentieth century by several nations, and adapted years after the First World War, mainly by the Wehrmacht, to incorporate weapons and modern vehicles as a method to avoid trench warfare and the war on fixed fronts in future conflicts.