Complex sentence: The battle was composed of several engagements, in which Polish forces were routed, and during the last rout, Żólkiewski was killed; according to an anecdote, he refused to retreat, preferring to stay with the rear guard till the very end.
Split into simpler sentences: The battle was composed of several engagements, in which Polish forces were routed. During the last rout Żólkiewski was killed; according to an anecdote, he refused to retreat, preferring to stay with the rear guard till the very end.