Operation Leader
... that Operation Leader was the only offensive operation undertaken by the United States Navy in Northern European waters during World War II?
... that <b id="mwBN0"><a href="./Operation_Leader" id="mwBN4" rel="mw:WikiLink" title="Operation Leader">Operation Leader</a></b> was the only offensive operation undertaken by the <a href="./United_States_Navy" id="mwBN8" rel="mw:WikiLink" title="United States Navy">United States Navy</a> in Northern European waters during World War II?