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Migrants from China came in large numbers to participate in the gold rush.
They traded cotton with Europe for manufactured goods.
Before, trains, cars, airplanes and trucks existed, rivers were used for travel. They carried people and goods. However, this way of transportation was very slow. All that changed with the arrival of the steamboat in the late 1700s and early 1800s. The steamboat could travel at the amazing speed of 5 miles per hour. It soon changed all over river travel and trade and dominated the waterways.
The Continental System was a decree by the Emperor of France, Napoleon Bonaparte which was made to limit British trade and bankrupt the country.
At his mightiest, Napoleon controlled almost every powerful country in Europe, except for Britain and Russia. He found it difficult to directly attack Britain and instead wanted to bankrupt it.
However, this eventually backfired and left France in a very bad economic conditions and Britain took advantage of this.
Many smaller countries that France had annexed, took up arms against Napoleon and began to fight. With a weakened economic position, Napoleon eventually lost the Empire.