which invading tribe brought about the collapse of the gupta rule
Gupta Empire The empire gradually declined because of many factors such as substantial loss of territory and imperial authority caused by their own erstwhile feudatories, as well as the invasion by the Huna peoples (Kidarites and Alchon Huns) from Central Asia.[11][12] After the collapse of the Gupta Empire in the 6th century, India was again ruled by numerous regional kingdoms. A minor line of the Gupta clan continued to rule Magadha after the disintegration of the empire. These Guptas were ultimately ousted by the Vardhana ruler Harsha, who established his empire in the first half of the 7th century.[citation needed]
Sikh Empire The Sikh Empire (also Sikh Khalsa Raj, Sarkar-i-Khalsa or PaÃ±jab (Punjab) Empire), was a major power in the Indian subcontinent, formed under the leadership of Maharaja Ranjit Singh, who established a secular empire based in the Punjab.[4] The empire existed from 1799, when Ranjit Singh captured Lahore, to 1849 and was forged on the foundations of the Khalsa from a collection of autonomous Sikh misls.[5][6] At its peak in the 19th century, the Empire extended from the Khyber Pass in the west to western Tibet in the east, and from Mithankot in the south to Kashmir in the north. It was the last major region of the subcontinent to be conquered by the British.