The Royal Welch Fusiliers
... that "The Royal Welch Fusiliers" is the only march written by John Philip Sousa for a British Army regiment?
... that "<b id="mwAb8"><a href="./The_Royal_Welch_Fusiliers_(march)" id="mwAcA" rel="mw:WikiLink" title="The Royal Welch Fusiliers (march)">The Royal Welch Fusiliers</a></b>" is the only march written by <a href="./John_Philip_Sousa" id="mwAcE" rel="mw:WikiLink" title="John Philip Sousa">John Philip Sousa</a> for a <a href="./British_Army" id="mwAcI" rel="mw:WikiLink" title="British Army">British Army</a> regiment?