During the Great World War II, C4 was used exclusively on buildings and bridges. Engineer have a limited C4 to go throught barricade before reaching the master control terminal. A commando entered the building, placed C4 on critical points in the structure, and then detonated the C4, which eliminated the structure. This usage of C4 became commonplace throughout history, and during the Great World War II and Great World War III, C4 was used in this fashion. However, two important deviations to this usage were made by the commando Tanya.