--- title: "Open Door Notes — APUSH Definition & Exam Guide" description: "The Open Door Notes (1899-1900) were John Hay's demand for equal trade access in China. See how they show U.S. foreign policy expanding for the APUSH exam." canonical: "https://fiveable.me/apush/key-terms/open-door-notes" type: "key-term" subject: "AP US History" --- # Open Door Notes — APUSH Definition & Exam Guide ## Definition The Open Door Notes were diplomatic messages Secretary of State John Hay sent in 1899 and 1900 asking the imperial powers to allow equal trading rights for all nations in China and to respect China's territorial integrity, instead of carving China into exclusive spheres of influence. ## What It Is By the late 1890s, European powers and Japan had divided coastal China into **spheres of influence**, regions where one country controlled trade, [railroads](/apush/key-terms/railroads "fv-autolink"), and ports and could shut everyone else out. The United States, which arrived late to the imperial scramble and had no sphere of its own, wanted in on the Chinese market without conquering anything. So Secretary of State John Hay sent the first Open Door Note in 1899, asking the powers to keep their spheres open to all traders on equal terms. A second note followed in 1900, during the Boxer Rebellion, adding that China's territorial integrity should be preserved (no power should annex Chinese land outright). No nation formally agreed, but Hay announced the principle as accepted anyway, and the "Open Door" became the backbone of U.S. policy in East [Asia](/apush/unit-6/rise-industrial-capitalism-1865-1898/study-guide/KgfyIEY4fiMV5yk7Ng0X "fv-autolink") for decades. Think of it as empire on the cheap. The U.S. got access to [markets](/apush/unit-6/controversies-over-role-government-gilded-age/study-guide/CU4ireSXmjF3ZkbKgQYd "fv-autolink") without the cost of colonies, which is exactly the trade-first foreign policy the CED traces back to the early republic. ## Why It Matters On Fiveable this term lives with Topic 4.4, America on the World Stage, and supports learning objective [APUSH](/apush "fv-autolink") 4.4.A, which asks you to explain how and why American [foreign policy](/apush/key-terms/foreign-policy "fv-autolink") developed and expanded over time. That's the real payoff here. The essential knowledge for this objective (KC-4.3.I) says the early U.S. struggled to build an independent global presence and pushed to promote foreign trade, using diplomatic tools like the Monroe Doctrine to assert influence. The Open Door Notes are where that long arc lands by 1899-1900. The same young nation that warned Europe out of the Western Hemisphere in 1823 was now telling the great powers how to behave in Asia. If you can connect those two moments, you've got a ready-made continuity argument about American foreign policy expanding from hemispheric defense to global commercial ambition, which is exactly what the Works of Art and Science (WXT) and America in the World (WOR) themes reward. ## Connections ### [Sphere of Influence (Unit 7)](/apush/key-terms/sphere-of-influence) The Open Door Notes only make sense as a reaction to spheres of influence. Other powers wanted exclusive zones of control in China; Hay wanted the door propped open so American merchants could trade everywhere. Know one and you automatically understand the other. ### [Boxer Rebellion (Unit 7)](/apush/key-terms/boxer-rebellion) The 1900 [Boxer Rebellion](/apush/key-terms/boxer-rebellion "fv-autolink"), an anti-foreigner uprising in China, triggered Hay's second note. He worried the powers would use the crisis as an excuse to carve China up for good, so the second note added the promise to preserve China's territorial integrity. ### Imperialism (Unit 7) The Open Door is [American imperialism](/apush/key-terms/american-imperialism "fv-autolink") without flags planted. Instead of seizing colonies in China the way it did in the Philippines, the U.S. pursued economic empire through market access. That distinction (territorial vs. commercial imperialism) is a favorite MCQ angle. ### [Big Stick Diplomacy (Unit 7)](/apush/key-terms/big-stick-diplomacy) Hay's notes and Roosevelt's Big Stick are back-to-back chapters of the same story, an assertive U.S. claiming great-power status around 1900. The Open Door used diplomacy in Asia; the Big Stick used force and the threat of force in Latin America. ## On the AP Exam No released FRQ has used "Open Door Notes" verbatim, but the term earns its keep in two places. First, multiple-choice questions often pair an excerpt from Hay's notes (or a political cartoon of Uncle Sam holding open a door to China) with stems asking about purpose, historical context, or how the policy reflected U.S. economic interests. You need to identify that the U.S. wanted trade access without colonies and was responding to spheres of influence. Second, the Open Door is strong evidence for continuity-and-change essays about American foreign policy. A claim that U.S. policy consistently prioritized commercial expansion, from early trade promotion and the Monroe Doctrine through 1900, gets concrete support when you name the Open Door Notes as your turn-of-the-century evidence. ## Open Door Notes vs Sphere of Influence These get tangled because they appear in the same sentence on every test. A sphere of influence is exclusive: one imperial power dominates a region's trade and shuts rivals out. The Open Door Notes were the U.S. argument against exclusivity, demanding that every sphere in China stay open to all traders equally. If an MCQ asks what the U.S. wanted in China, the answer is equal access, not its own sphere. ## Key Takeaways - Secretary of State John Hay sent the Open Door Notes in 1899 and 1900 to ask the imperial powers for equal trading rights for all nations in China. - The second note, sent during the Boxer Rebellion, added that China's territorial integrity should be preserved so no power could annex Chinese territory outright. - No country formally agreed to the notes, but Hay declared the principle accepted, and the Open Door shaped U.S. policy in East Asia for decades. - The Open Door represents commercial imperialism: the U.S. wanted access to Chinese markets without the expense of taking colonies there. - For APUSH 4.4.A, the notes are end-of-arc evidence that American foreign policy expanded over time, from promoting trade and asserting the Monroe Doctrine in the early 1800s to dictating terms to great powers in Asia by 1900. ## FAQs ### What were the Open Door Notes in APUSH? They were diplomatic messages [Secretary of State John Hay](/apush/key-terms/secretary-of-state-john-hay "fv-autolink") sent in 1899 and 1900 asking European powers and Japan to allow all nations equal trading access in China and to respect China's territorial integrity, rather than dividing it into exclusive spheres of influence. ### Did the other countries actually agree to the Open Door Notes? No. No power formally accepted Hay's proposal; most gave vague or conditional replies. Hay simply announced that acceptance was "final and definitive" anyway, and the U.S. acted as if the policy were in force. The exam cares about the principle and its motives, not a treaty (there wasn't one). ### How are the Open Door Notes different from spheres of influence? They're opposites. A sphere of influence gave one imperial power exclusive economic control over part of China, while the Open Door Notes demanded that those zones stay open to traders from every nation equally. The U.S. pushed the Open Door precisely because it had no sphere of its own. ### Are the Open Door Notes the same as the Open Door Policy? Essentially yes. The notes were the actual documents Hay sent in 1899-1900, and the Open Door Policy is the broader U.S. stance toward China that grew out of them. APUSH questions use the terms almost interchangeably. ### Why did the United States send the Open Door Notes? After acquiring the Philippines in 1898, the U.S. wanted access to China's huge market but had arrived too late to claim a sphere of influence. 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