Two of the world's largest deserts, the gobi and the takla makan, are found to the north and west of china. these deserts served as a natural border that kept the chinese isolated from the rest of the world in ancient times. eventually, however, a group of invaders made their way into northern china by way of the gobi desert. which group was this?

The group of people that managed to get into northern China by way of the Gobi Desert were the Mongols. The Mongols were united in the 13th century by Temudzin, better known as Genghis Khan. Instead of trying to fight the Chinese through the wall they have built for protection from the Mongol and Turkic people, he led his armies around the wall and entered China in it's northwestern part, and was moving through the northern border by the way of the Gobi desert and captured the Chinese cities one by one, and eventually got all of China under Mongol rule.

St. Louis
Missouri River
Mississippi River
What is present day Yankton, South Dakota
Columbia River