Complex sentence: Suffering from a lack of infantry the Israelis brought up paratroopers during the night of October 16/17, tasked with clearing anti-tank defenses for the armor, but these became pinned down by heavy Egyptian fire.
Split into simpler sentences: Suffering from a lack of infantry, the Israelis brought up paratroopers during the night of October 16/17. They were tasked with clearing anti-tank defenses for the armor, but they became pinned down by heavy Egyptian fire.