Signed on June 28, 1919 between Germany and the principal Allied powers, the Treaty of Versailles formally ended World War I. Problematic from the very beginning, even its contemporaries saw the treaty as a mediocre compromise, creating a precarious order in Europe and abroad and destined to fall short of ensuring lasting peace. At the time, observers read the treaty through competing lenses: a desire for peace after five years of disastrous war,...