The compass, the astrolabe (instrument used to measure latitude), and the rudder <span>all helped European explorers on their quest to find Asia and get rich by by </span><span>buying spices there and selling them in Europe to get a profit.
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During World War I women needed to work taking the jobs of their husbands once they came back from war that’s one famine started many became poor and money became almost nothing at all, then the great depression hit and World War II happened
I think it becomes difficult because they all wanted to have more advantages than anyone else, that became too much for the country that they defeated. The Potsdam Conference became difficult because they have problems on the things that they should do with Germany that they want to completely disarm the country.