It cost around 15 million dollars
Best way I can put it is look at World War I. We started riding in on horses and using outdated rifles but by the end of the war we had tanks and the beginning of weapons that could shoot more bullets than ever before in war
It change when the us president moved the us pacific in California to Pearl Harbor this move was a threat to japan because they wanted to expand in the Pacific Ocean.japan became inevitable and joined World War Two by attack the pearl harbour place
Think of it like this, say your little brother got angry at your youngest brother and hit him. Then your mother and father get mad at you for starting it. This is what Germany felt after WW1. This sowed bitterness into German society, and with Hitler on the stage. It turned into obsessive hatred. Soon people had differing opinions, and they turned radical fast during the Great Depression. As someone did say. "I am more afraid of peace, than war."
It is important because if the cause didn't happen the effect wouldn't exist
