In both World War I and World War II, new weapons and vehicles were used during combat. Machine guns very new and determined the outcome of some battles during WWI and in WWII the machine gun had more improvements and became even more useful to armies. Tanks were a great source of creating destruction, and a powerful source of transportation. The tank is a heavy armored vehicle with a cannon that can move, and not be easily destroyed. Airplanes in World War I were not nearly as useful as in World War II. Aerial bombing not only played a major part of military tactics, but was also used strategically to take out vital pieces of certain countries to weaken them.
Some of the differences were that during World War I and the beginning of World War II, technology improved considerably. Horses, trench warfare, and biplanes became a thing of the past and were considered obsolete in World War II. Military equipment became bigger, faster, more reliable, and more sophisticated. World War II saw more air and sea battles than World War I as the majority of World War I had been fought on land. Advances had been made in medicine between the two wars so that fewer people died from infected wounds and disease.