210 years ago today, on March 25, 1815 (February 15, 1815), Austria, Britain, Prussia, and Russia established the Seventh Alliance against France. On March 25, 1815, Austria, Britain, Prussia, and Russia established the Seventh Alliance against France to maintain the established order in Europe. After Napoleon established the "Hundred Days Dynasty" in 1815, the European monarchies remobilized their troops to form the Seventh Alliance against France. In June 1815, the French army was defeated at the Battle of Waterloo, and Napoleon abdicated for the second time; in October, he was exiled to St. Helena. Napoleon died on the island on May 5, 1821.