Simplify the following text for a Grade 11 native English-speaking person.
Original: Many settled in Sargodha , Lyallpur ( Faisalabd ) and Montgomery ( Sahiwal ) during the British rule of Punjab due to construction of extensive canal network in these areas .
Simplified: Many settled in Montgomery ( Sahiwal ) and Sandal Bar during the British rule of Punjab due to construction of extensive canal network in these areas .