Napoleon's Continental System was designed to destroy the British economy completely by blocking any trades from allies to Britain and even the neutral countries. Britian counter blocked and resulted in the Anglo-American War of 1812.
The U.S. Senate and the House of Representatives
Of what is listed Germany lost the highest percentage of its population. Their numbers, though, were no where near the percentages of what was lost by the USSR. More men were lost there. Russia actually had both men, women, and children fighting in the war. This allowed for a greater chance of more loss of life.