Complex sentence: As planned, Iranian commandos secretly entered Herat to begin the insurrection on November 12th, which successfully gave way to, what Ismail Khan claimed to be, the local uprising against the Taliban leaders.
Split into simpler sentences: As planned, Iranian commandos secretly entered Herat to begin the insurrection. The Iranians launched the insurrection, which successfully gave way to, what Ismail Khan claimed to be, the local uprising against the Taliban leaders.