Final answer:
The main way WW2 was fought on the battlefield was through mechanized warfare with advancements in military technology allowing for fast-moving tanks and airpower, including the blitzkrieg tactic and, in the Pacific Theater, eventually the use of atomic bombs.
Step-by-step explanation:
The main way that World War II was fought on the battlefield was through mechanized warfare, making use of tanks, airplanes, and other vehicles powered by gasoline and diesel fuels. While trench warfare was a hallmark of World War I, WWII saw the development and use of fast-moving, heavily armored tanks and advanced airpower that allowed military forces to strike quickly and powerfully. Significant advancements in military technology since World War I enabled this shift towards more mobile warfare. One notable strategy in WWII was known as blitzkrieg, a German tactic involving fast and piercing attacks through enemy lines, which were particularly effective during the invasion of Poland. Other strategies also came into play, such as guerilla tactics in occupied territories and the eventual use of atomic bombs by the United States in the Pacific Theater.