<Li> Battle of Sinop, 30 November 1853 </Li> <Li> Siege of Silistra, 5 April - 25 June 1854 </Li> <Li> First Battle of Bomarsund, 21 June 1854 </Li> <Li> Second Battle of Bomarsund, 15 August 1854 </Li>

Explain the causes and effects of the crimean war