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Asia
Asia
I presume that by content you mean continent. The Mongol Empire reached Eastern Europe.
It is South America, specifically the northern part of Paraguay.
Lewis and Clark traveled West through the Louisiana Purchase, St. Charles, Fort Mandan, and reached the Pacific Ocean.
Columbus thought he had reached India (which is a country in the continent of Asia) but in reality he had landed on Caribbean Islands (North America). (this is why Native Americans are called Indians).
The continent west of Asia is Europe.
Asia
Because Mexicans traveled north and Asians traveled east to settle in the West.
Because Mexicans traveled north and Asians traveled east to settle in the West.
Heading west from Australia, the next continent you will encounter is Africa.
One railroad reached the west coast.