Why are military use the eniac edvac edsac univac?

The military utilized early computers like ENIAC, EDVAC, EDSAC, and UNIVAC for their ability to perform complex calculations quickly and accurately, which was essential for tasks such as artillery trajectory calculations and cryptography. These machines significantly reduced the time required for computations that were previously done manually, enhancing operational efficiency and effectiveness. Additionally, their use in data processing and simulations supported strategic planning and decision-making during military operations.