Napoleon's Invasion of Russia

Napoleon's invasion of russia in 18 12 had a major de stabilizing domino effect and pretty much spelled the end of the french occupation of spain. The allies were emboldened to launch new offensive, just as napoleon was forced to draw troops out of spain in his ultimately failed attempt to hold on to his collap in eastern flank. So in iberia, the allied, british, portuguese and spanish forces under wellington advanced in the summer of 18 12 ad they actually chased king joseph out of madrid and took the capital. But a french counter attack in the fall forced the allies into retreat. By that point, reports of