<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (October 2014) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (October 2014) (Learn how and when to remove this template message) </Td> </Tr> <P> Top Secret Drum Corps is a drum corps based in Basel, Switzerland . With 25 drummers and colorguard members, the corps became famous for its demanding six - minute routine performed at the Edinburgh Tattoo in 2003 . With its invitation to Edinburgh, Top Secret became one of the first non-military, non-British Commonwealth acts to perform on the Esplanade at Edinburgh Castle . </P> <P> Since its success in 2003, Top Secret was invited to return to Edinburgh in 2006 with a new and improved routine . They were invited a third time in 2009 and again in 2012 and 2015 . Under the leadership of Erik Julliard, the band is also responsible for the founding of the Basel Tattoo, a military tattoo show similar to the Edinburgh Military Tattoo, now held annually in Basel . </P>

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