Complex sentence: While two dismounted troops with eight Hotchkiss guns advanced from Karm to a stone building in the Khasif ruins, a dismounted troop held Karm, and the remaining two troops, with led horses took cover behind Goz el Basal, further back towards Tel el Fara.
Split into simpler sentences: While two dismounted troops with eight Hotchkiss guns advanced from Karm to a stone building in the Khasif ruins, a dismounted troop held Karm. The remaining two troops, with led horses, took cover behind Goz el Basal, further back towards Tel el Fara.