Historical thriller is a thriller subgenre in which the narrative occurs in a period of some historical significance. Books are usually set prior to 1970. Historical detail, accuracy, and an authentic atmosphere are a must. Sometimes, but not always, the narrative crosses the present, showing the repercussions of past events.
Well-known writers include Ken Follett, Steve Berry, and Robert Harris.
If you write historical thriller, explore the subgenre to connect with other like-minded writers, workshop, and publish your book.