After losing the battle of trafalgar, napoleon planned an economic war against britain. he tried to stop the entry of british goods into europe. this policy was known as the . after russia left the continental system, napoleon .

After the battle of Trafalgar destroyed the French and Spanish fleets,and thus any chance Napoleon had of physically invading Britain,he decided that if Britain were crippled economically it could be brought to terms imposed by France. So,all territories controlled by or allied to napoleon were forbidden from trading with Britain in any way,shape,or form under the Berlin Decree of 1806 and the Milan Decree of 1807. 

It failed - it was the economies of continental Europe that were crippled rather than that of Britain,and Russia dropped out of the Continental System in 1811;Napoleon's disastrous invasion of Russia in 1812 was carried out because napoleon wanted to force Russia back in to the Continental System.