The next attempt to break Britain's dependence on the Baltic once again occurred during a great Europe wide conflict that had significant naval elements. The Napoleonic Wars reopened Britain's fears of the Baltic timber trade being severed. Denmark and the straits, like all of continental Europe, were at the mercy of Napoleon's army and many of the rest of the timber ports within the Baltic were threatened by Napoleon's Continental system. The government thus made a more concerted attempt than ever before to break Britain's dependence upon Baltic timber. Throughout the period commencing in 1795 tariffs on foreign timber imports steadily rose. Eventually in 1807 a 275% levy was placed upon all Baltic timber imports to Britain. This levy succeeded in making Canadian timber more cost effective than that from the Baltic. Canadian timber exports to Britain more than tripled from 27,000 loads in 1807 to 90,000 loads in 1809. The sheer bulk of timber and its many requirements soon led the transatlantic timber trade to become Britain's largest employing a quarter of Britain's merchant tonnage. The previous large Baltic trade almost vanished with European wood being used only for luxury items.