Which article of the Constitution established the Legislative branch?

The Legislative branch of the United States government is established by Article I of the Constitution. This article outlines the structure, powers, and responsibilities of Congress, which is divided into two chambers: the House of Representatives and the Senate. Article I not only defines how members of Congress are elected and the terms they serve but also enumerates the specific legislative powers granted to Congress, such as the ability to levy taxes, regulate commerce, and declare war. Understanding Article I is crucial because it forms the foundation for the legislative process and the overall system of checks and balances in the federal government.