During the Napoleonic Wars, the Grande Armée of France regularly maintained multiple fronts. In the seven year long Peninsular War (1807–1814) imperial French contingents and Spanish and Anglo-Portuguese armies wrestled for control of the Iberian Peninsula in numerous battles. Nonetheless, in 1812 as French military presence in Iberia had begun to decline, emperor Napoleon Bonaparte personally lead an army of more than 600.000 troops to the east into Russia, seeking to decisively defeat the Russian Empire and force Tsar Alexander I to comply with the Continental System. Great Britain was also present on multiple fronts of the Napoleonic Wars in Europe and the Canadian, the Chesapeake Bay and Louisiana theaters of the War of 1812 in North America.