Complex sentence: Bahadur Shah and his successors won kingdoms west of Kali River after 1790 and extended Nepal's boundaries westward to beyond Satluj River until the tide turned in 1809 and Kangra king repulsed Gorkha army eastward with help from Maharaja Ranjit Singh.
Split into simpler sentences: Bahadur Shah and his successors won kingdoms west of Kali River after 1790 and extended Nepal's boundaries westward to beyond Satluj River. In 1809 and Kangra king repulsed Gorkha army eastward with help from Maharaja Ranjit Singh.