Uh Idk but I do know you not in high school because I have the same question in I'm in 8th grade
The Best Explanation for why the Cold War is not Included in the chart Is because:
~That was not a Conventional War, and its Costs are Measured by the Individual Proxy Wars.
Hope this helps.
Those factors were:
city-states
the drawing of political borders
divide and rule policies
America wasn’t happy and they joined the war and got America got back at japan, which was called the midway battle.
