Complex sentence: The campaign ended on October 17, as Puntland forces seized the villages of Dhagah Barur, Dhagahdheer, and Dindigle, which was al-Shabaab's last stronghold in the region.
Split into simpler sentences: The campaign ended when Puntland forces seized the villages of Dhagah Barur, Dhagahdheer, and Dindigle on October 17. Dindigle was al-Shabaab's last stronghold in the region.