These victories led to the worldwide expansion of French revolutionary ideals and reforms, such as the metric system, the Napoleonic Code and the Declaration of the Rights of Man. In June 1812, Napoleon attacked Russia, reaching Moscow. Thereafter his army disintegrated through supply problems, disease, Russian attacks, and finally winter. After the catastrophic Russian campaign, and the ensuing uprising of European monarchies against his rule, Napoleon was defeated and the Bourbon monarchy restored. About a million Frenchmen died during the Napoleonic Wars. After his brief return from exile, Napoleon was finally defeated in 1815 at the Battle of Waterloo, the monarchy was re-established (1815–1830), with new constitutional limitations.