Final answer:
The Russian Campaign was initiated by Napoleon due to political and trade disputes with Russia. A massive non-French Grand Army faced a Russian scorched-earth strategy, resulting in a disastrous retreat and ultimately Napoleon's abdication and exile.
Step-by-step explanation:
The Russian Campaign was caused by a series of strategic and political tensions between France and Russia. These included disputes over continental trade policies and Russia’s refusal to cease trading with Britain, which was in direct conflict with Napoleon's Continental System designed to weaken the British economy. As tensions escalated, Napoleon assembled a massive force known as the Grand Army, which included many non-French recruits.
The campaign turned disastrous for the French as the Russians employed a scorched-earth policy, retreating and burning their own lands to deny resources to the advancing enemy. With no decisive Russian engagement and a harsh winter approaching, Napoleon was forced to retreat from Moscow. Along the arduous retreat, his forces were decimated by the cold, disease, and relentless Russian attacks. Finally, the coalition forces saw an opportunity and regrouped to forcefully end Napoleon’s rule. All this culminated in Napoleon’s abdication following the overwhelming defeat at the Battle of Leipzig and the invasion of Paris by coalition forces in 1814. Napoleon was exiled to Elba while Louis XVIII was restored to the French throne under the Treaty of Fontainebleau.