In March 1802, France and Britain agreed to cease hostilities under the Treaty of Amiens. For the first time in ten years, all of Europe was at peace. However, many problems persisted between the two sides making the implementation of the treaty increasingly difficult. Bonaparte was angry that British troops had not evacuated the island of Malta. The tension only worsened when Bonaparte sent an expeditionary force to re-establish control over Haiti. Prolonged intransigence on these issues led Britain to declare war on France on 18 May 1803 despite the fact that Bonaparte finally accepted the occupation of Malta by the British. The nascent Third Coalition came into being in December 1804 when, in exchange for payment, an Anglo-Swedish agreement was signed allowing the British to use Swedish Pomerania as a military base against France.