Why might one study world history by entire eras rather than by separate dates and events?

Why do we observe black history minth?

Match each treaty with its description. treatys- a the munich agreement b the pact of steel c the molotov-ribbentrop pact descriptions- 1- an alliance between germany and italy 2- an agreement between germany and the soviets dividing eastern europe 3-an agreement between germany, france, italy, and britain granting germany a small part of czechoslovakia in return for peace

Without george washingtons invention, what aspect of life most likely would be impacted