Later, over ten-thousand Soviet and Afghan communist troops invaded the region, resulting in a massive refugee flow of the populace into Khyber Pakhtunkhwa, Pakistan. There were Spetsnaz units based in Asadabad (where the Pech meets the Kunar), in Jalalabad (where the Kunar meets the Kabul), and other towns. The major mujahideen groups had representation in the area, and were successful enough to confine the Communist troops for the most part to their fortifications in the major towns of the Kunar valley.