He did not actively prosecute the war ; Alexander instead restricted Russia 's contribution to the bare requirement to close off trade .
On 26 October 1807 , Tsar Alexander formally declared war on the United Kingdom after the British attack on Copenhagen in September 1807 .
Alexander did not actively prosecute the war ; Alexander instead restricted Russia 's contribution to the bare requirement to close off trade .
On 26 October 1807 , Tsar Alexander formally declared war on the United Kingdom after the British attack on Copenhagen in September 1807 .