Complex sentence: The attempt was repelled by the 1st Moroccan Infantry Division, costing the 4th "Panzer" Division another 42 tanks, 26 of which were irreparable but the French defensive success was made irrelevant by events further south.
Split into simpler sentences: The attempt was repelled by the 1st Moroccan Infantry Division, costing the 4th "Panzer" Division another 42 tanks, 26 of which were irreparable. This French defensive success was made irrelevant by events further south.