Complex sentence: During the First Chechen War the Yamadayev brothers fought against the Russian troops and enjoyed great influence as field commanders and Dzhabrail Yamadayev held the rank of Ichkerian Brigadier General.
Split into simpler sentences: During the First Chechen War the Yamadayev brothers fought against the Russian troops and enjoyed great influence as field commanders. He held the rank of Ichkerian Brigadier General.