Given the task definition and input, reply with output. This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Many of the crucial events of the American Revolution—the Boston Massacre, the Boston Tea Party, Paul Revere's midnight ride, the battles of Lexington and Concord and Bunker Hill, the Siege of Boston, and many others—occurred in or near Boston. After the Revolution, Boston's long seafaring tradition helped make it one of the world's wealthiest international ports, with rum, fish, salt, and tobacco being particularly important.
Boston became one of the wealthiest international ports after what war?