The Napoleonic Wars was conflicts involving Napoleon's French Empire and changing sets of European allies and opposing coalitions that ran from 1803 to 1815. As a continuation of the wars sparked by the French Revolution of 1789, they revolutionized European armies and played out on an unprecedented scale, mainly due to the application of modern mass conscription. French power rose quickly, conquering most of Europe, but collapsed rapidly after France's disastrous invasion of Russia in 1812. Napoleon's empire ultimately suffered complete military defeat resulting in the restoration of the Bourbon monarchy in France. The wars resulted in the dissolution of the Holy Roman Empire. Meanwhile the Spanish Empire began to unravel as French occupation of Spain weakened Spain's hold over its coloni