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The Anglosphere is the Anglo-American sphere of influence, with a core group of nations that today maintain close political, diplomatic and military co-operation. While the nations included in different sources vary, the Anglosphere is usually not considered to include all countries where English is an official language, so it is not synonymous with the sphere of anglophones, though commonly included nations are those that were formerly part of the British Empire and retained the English language and English Common Law. The five core countries of the Anglosphere are usually taken to be Australia, Canada, New Zealand, the United Kingdom, and the United States. These countries enjoy close cultural and diplomatic links with one another and are aligned under military and security programmes.