One of the similarities that these wars had was in tactics. Some of the tactics used in WWI were early forms of the Blitzkrieg tactic.
Also there were differences in the tactics. Most of the tactic used in WWI was the trench warfare, a more defensive way to fight, and in WWII full formed Blitzkrieg tactics were used, which was a more offensive attack.
The two wars also shared some similar weaponry and technology. In both wars they used the submarine or U-boat. They also both used gasses, but they were different gasses.
Besides the similar weapons and technology, both wars also had different advancements. The WWI the inventions were quite primitive, but in WWII, ships had radars, the helicopter was introduced, airplanes were able to land in the ocean with aircraft carriers, planes were able to fly off the carriers because they had only one pair of wings, and the biggest advancement in weapon technology then was the atomic bomb.
Also the two wars also shared some similar geographic locations. Both wars took place in many different areas, but both wars took place in Europe, the Middle East, China, and Africa.
Besides sharing some similar locations, both wars took place in different areas, in WWII it took place mainly in the sea and air, in WWI it took place mainly on land because they didn’t have much equipment to carry on a war in the air or sea. When it came to important leaders, not many from WWI stayed in power for WWII. Winston Churchill remained in power for both wars In WWI the main leaders were Woodrow Wilson, Vladimir Lenin, and Churchill. In WWII the main leaders were Franklin D. Roosevelt, and Joseph Stalin (which made up the allied power) and Adolf Hitler,...