British colonists' plunder, oppression and military repression.
Since Columbus discovered America, North America has gradually become a European colony. 1763, with the end of the French-Indian War, Britain became the overlord of North America. Without the threat of war, the relationship between North American colonies and Britain began to alienate and no longer needed British protection. However, in order to safeguard local monopoly interests, Britain has promulgated a series of high tax laws. 1764, the sugar law was promulgated, requiring American colonies to buy a large number of British sugar, coffee, wine and other commodities; The Stamp Tax Law was promulgated on 1765, and all printed materials are directly taxed. These heavy economic burdens made the colonial people strongly resist. Because the colonies had no representation in the British Parliament, they shouted the slogan "No representation, no tax". At the same time, the North American colonies boycotted and interrupted trade with British businessmen. 1766, the British parliament was forced to abolish the stamp tax law, but in the second year, it began to impose high tariffs on goods urgently needed by the colonies (glass products, paper, lead, pigments, tea, sugar, rum, iron, cotton, etc.). ). The colony once again interrupted its trade with Britain and smuggled these goods through the Caribbean.
Under this background, the North American colonies launched a heated discussion on the relationship between Britain and the colonies, and the dominant view was that the suzerain had no right to tax the colonies. Radicals even think that the British Parliament has no legislative power in the colonies. For Britain, the criticism of the Townsend Ordinance, which was promulgated to maintain its dominance in North America, aroused British anxiety, which led to the deployment of British troops to Boston, where 4,000 British soldiers were stationed, and the population was only16,000. This made the colonial people think that the sovereign state wanted to seize the rights and freedoms of the colony, and when it was fed up, it organized itself to prepare for armed struggle.