Habeas Corpus has often been suspended in times of conflict, when it has been deemed necessary.  There is a longstanding tradition of suspending Habeas Corpus protections during times of war and conflict. For example, President Lincoln suspended Habeas Corpus during the Civil War. [1] Habeas Corpus was also suspended briefly in the Hawaii during World War II, immediately after the attacks on Pearl Harbour. [2] In the UK, Habeas Corpus was suspended in 1794, after the French declared war on Britain, [3] and in 1817, [4] in order to arrest parliamentary reformers. In 1971 Habeas Corpus was again suspended in the UK in order that IRA suspects could be arrested and detained. [5] 9/11 and other Al Qaeda plots require that Western countries respond in just as determined a way. The war on terror may not follow the rules of traditional warfare, but it is a war nonetheless. These precedents show that, in certain circumstances, the suspension of Habeas Corpus is both necessary and justified.  [1] Lincoln, Abraham, ‘Proclamation Suspending the Writ of Habeas Corpus’, teachingamericanhistory.org, 24 September 1862,   [2] Anthony, J. Garner, Hawaii under Army Rule, Stanford University Press, p.5,   [3] Holmberg, Tom, ‘Great Britain: Suspension of Habeas Corpus. 7 May 1794’, The Napoleon Series, July 2002,   [4] ‘Habeas Corpus Suspension Bill’, Hansard, 24 June 1817, vol.36, cc1145-55,   [5] Wilkinson, Paul, Terrorism versus Democracy: The Liberal State Response, 2nd ed., Routledge, 2006, p.82,