Complex sentence: The next task Manekshaw took-up was to reorganise the troops in the North-East Frontier Agency (NEFA), where he took measures to overcome shortages of equipment, accommodation, and clothing.
Split into simpler sentences: The next task Manekshaw took-up was to reorganise the troops in North-East Frontier Agency (NEFA). He took measures to overcome the shortages of equipment, accommodation, and clothing.