A series of major military efforts by the Mongols to invade China. was 6 decades in the 13th century. defeat of the Jin dynasty, Western Xia, the Dali Kingdom and the Southern Song. led by Genghis khan
B because its very dangerose veryyyer
Answer: Introduction—What is a Boomtown? A boomtown can be simply defined as a community undergoing rapid growth due to sudden economic shock. There is a long history of U.S. boomtowns linked to natural resource development dating back to the 1849 gold rush, which sparked a massive population migration to California
