Complex sentence: But later on the British Rulers generated and created the other Urban (Cities') development system and initially when the British Rulers made Tehseels in Punjab and other provinces, they named these small Urban Areas (Towns) as "Talukas" in Sindh.
Split into simpler sentences: But later on the British Rulers developed the other Urban (Cities') areas. The British Rulers named the developed areas as Tehseels in Punjab and other provinces, but they named these small Urban Areas (Towns) as "Talukas" in Sindh.