Simplify the following text for a Grade 12 native English-speaking person.
Original: It extended along the right bank of the Sutlej River from the Himalaya to Multan , and comprised the six districts of Sialkot , Gujranwala , Montgomery , Lahore , Amritsar , and Gurdaspur .
Simplified: It extended along the right bank of the Sutlej River from the Himalaya to Multan , and was made up of the six districts of Sialkot , Gujranwala , Montgomery , Lahore , Amritsar , and Gurdaspur .