Complex sentence: On the night of December 8,2012, Byers' unit was inserted by helicopter in Qarghah’i District of Laghman Province, eastern Afghanistan, from there they hiked over difficult terrain for more than four hours to reach the compound where the Taliban were holding the hostages.
Split into simpler sentences: On the night of December 8,2012, Byers and his unit were inserted by helicopter in Qarghah’i District of Laghman Province, eastern Afghanistan. They hiked more than four hours over difficult terrain to reach the compound where the Taliban were holding the hostages.