Complex sentence: It was as a field commander that Krobatin was most successful, and following his role at Caporetto in October 1917 during which his force captured two Italian divisions he was promoted to Field Marshal on November 5,1917.
Split into simpler sentences: It was as a field commander that Krobatin was most successful. Following his role at the Battle of Caporetto in October 1917, during which his force captured two Italian divisions, he was promoted to Field Marshal on November 5,1917.