Complex sentence: The Polish forces caught up again with the Russians on 27 September, near Chudniv; at that point the Russian and Cossack armies had lost about 1,000 troops and the Poles, about 100 (not counting the wounded).
Split into simpler sentences: The Polish forces caught up again with the Russians on 27 September, near Chudniv. At that point, the Russian and Cossack armies had lost about 1,000 troops, and the Poles about 100 (not counting the wounded).