The dust bowl was a sever drought caused by fluctuations in ocean temperatures. Other factors that contributed to the affect it had on the Midwest was the dry climate and their use of poor farming techniques.
Monsoons can cause many different problems but perhaps the most devastating are the floods that can take up an entire city which leads to isolation and sickness.
Ethiopia purchased modern weapons from France and Russia.
Ethiopia won its wars against Italy and has successfully secured its sovereignty because they bought some artillery pieces from Russia. Russia also supported Ethiopia with military advisers and army training. United Kingdom and France also supported Ethiopia to prevent Italy from becoming their colonial competitor.
<span>The Mongols were more successful at emerging from central Asia where larger groups were not due to several factors:
1- The Mongols had the advantage of having </span><span>Genghis Khan with them
2- Their number was much less than that of other pastoral groups
3- They did not depend on civilization for transportation. Instead, they rode horses in order to </span>border the Siberian forest. They depended on <span>hunting, herding and arching for protection and for getting food.</span>