Complex sentence: Hendrik Alexander Seyffardt (1872--1943) was a Dutch general, who during World War II collaborated with Nazi Germany during the occupation of Netherlands, ost notably as a figurehead of the Dutch Legion, a unit of the Waffen-SS on the Eastern Front.
Split into simpler sentences: Hendrik Alexander Seyffardt (1872--1943) was a Dutch general, who collaborated with the Nazis during the occupation of Netherlands. During World War II he collaborated with Nazi Germany as a figurehead of the Dutch Legion, a unit of the Waffen-SS on the Eastern Front.