[1] The Maithili poet, Vidyapati, referred to Narasimhadeva as "Satyavira" to allude to how turbulent his reign was.
He also showed defiance against Tughral Tughan Khan of the Mamluk Sultanate of Delhi.
Khan responded by carrying out raids in Mithila and capturing Narasimhadeva who was later released in Darbhanga.
He also engaged in a conflict with Iwaz Khalji who was the Governor of Bengal who undertook an expedition to Mithila and succeeded in compelling the Karnatas to pay tribute.
[2] Due to this, it has been said that Mithila first felt the presence of Muslim invasions during Narasimhadeva 's reign.