Complex sentence: Buddhism in Magadha went into decline due to the invasion of Muhammad Bin Bakhtiar Khilji, during which many of the viharas and the famed universities of Nalanda and Vikramashila were destroyed, and it was claimed that thousands of Buddhist monks were massacred during 12th century.
Split into simpler sentences: Buddhism in Magadha went into decline due to the invasion of Muhammad Bin Bakhtiar Khilji, during which many of the viharas and the famed universities of Nalanda and Vikramashila were destroyed. It was claimed that thousands of Buddhist monks were massacred during the 12th century.