During World War I and the Vietnam War, soldiers used tools such as guns, medication to keep calm, kits first aid, hand-to-hand combat weapons, food rations. , a form of communication such as walkie-talkies or Morse code. Due to the different types of terrain the soldiers would find themselves in, different tools would be needed to help them survive. On rocky terrain, for example, they may wear heavier, more durable boots so they can continue to cover the terrain. “When a mission took them into the mountains, they carried mosquito nets, machetes, canvas tarps and extra bug juice.” During World War I, American soldiers crossed seas to countries like Europe, the Middle East, and Asia so they could participate in the war. Since soldiers had to travel, they had to take medicine to avoid contracting diseases from foreign people..