A "history nerd" refers to someone who is very interested in and knowledgeable about history. They enjoy studying, learning, and discussing historical events and topics in depth. Full definition
As a fashion history nerd I am in love with this post! (attireclub.org)
Although I was quite interested in many of the stops (culture & history nerd over here too), I would love to really see its entirety instead of passing through it quickly! (probearoundtheglobe.com)
As a military history nerd, I'm reminded of the tanks of World War 2 — the Russians built a standard model (the T - 34) that was good enough, easy to manufacture in huge numbers and easy for draftee farmboys to learn to use (the Americans solved the same problem with the Sherman). (epolitics.com)