Complex sentence: Boyle provided covering fire for the landing of troops of the French Foreign Legion at Bjerkvik in May 1940 and, although Narvik was briefly captured, he was asked to support the withdrawal of all allied troops in June 1940.
Split into simpler sentences: Boyle provided covering fire for the landing of troops of the French Foreign Legion at Bjerkvik in May 1940. Although Narvik was briefly captured, he was asked to support the withdrawal of all allied troops in June 1940.