{{Context, date=May 2016
Tahmasp Khan Jalayer was one of the most prominent and battle-hardened generals of the Naderian wars and served
Nader Shah
Nader Shah Afshar ( fa, نادر شاه افشار; also known as ''Nader Qoli Beyg'' or ''Tahmāsp Qoli Khan'' ) (August 1688 – 19 June 1747) was the founder of the Afsharid dynasty of Iran and one of the most powerful rulers in Iranian ...
from the very early days of his military career in Khorasan until he was forced to rebel during the last year of Nader's reign as Shah.
Tahmasp Jalayer was present in many of the key engagements of Nader's career and was instrumental in
Reza Qoli Mirza Afshar
Reza Qoli Mirza Afshar (1719–1749) was the first son of the Afsharid conqueror Nader Shah. When Nader came under the service of a Persian nobleman who hired him as a courier, Nader killed his assistant courier. Though his speech to the Persian ki ...
's military successes against the Uzbeks. He fought alongside Nader in the
Battle of Karnal
The Battle of Karnal (24 February 1739), was a decisive victory for Nader Shah, the founder of the Afsharid dynasty of Iran, during his invasion of India. Nader's forces defeated the army of Muhammad Shah within three hours, paving the way fo ...
where he commanded the right wing of the Iranian army. During the last years of Nader's rule in Iran he was forced into rebellion as Nader, who at this point had begun to slip further into insanity and paranoia, declared him a traitor to test his loyalties.
Adil Shah
Ali-qoli Khan ( fa, علیقلیخان), commonly known by his regnal title Adel Shah (also spelled Adil; , "the Just King") was the second shah of Afsharid Iran, ruling from 1747 to 1748. He was the nephew and successor of Nader Shah (), th ...
convinced him that open rebellion against Nader was the only solution but later Tahmasp Jalayer showed signs of wanting to be reconciled with Nader and so Adil Shah had him killed. The irony of his death was that he died as a loyal subject in open rebellion against a Shah who had forsaken him.