Complex sentence: More fighters succeeded in getting out of Komsomolskoye in small groups, including some 100 led by Gelayev on March 10; however only a handful of those who remained in the village survived the battle or the captivity.
Split into simpler sentences: More fighters succeeded in getting out of Komsomolskoye in small groups, including some 100 with Gelayev on March 10. However, only a handful of those who remained in the village survived the battle or the captivity.