Same here but mine was confined to WWII, and a little WWI, aviation history. I devoured books on it, mostly by Martin Caidin (yes, the Six Million Dollar Man author) and Edward Jablonski.
In the Marine Corps I gained an interest in all Marine Corps history and then, because it caused the most dramatic change in the nature of the Marine Corps, the history of Japan.
Not a whole lot of history, just the basics but historical fiction like Shogan turned me onto James Clavell. Concurrently, I was also interested in Eastern philosophy and religion.
Much is made about the brutality of the Japanese to prisoners. What is not made much about is that, to their way of thinking, duty and honor were everything. To not "die trying", to let oneself be captured alive was an act of disgrace. Cowardice. Why not slap cowards around a little bit?
Now compare that to the Spartans and we'll see the similarities in "life view". LOL
I love military history and World War 2 history, myself.
My latest endeavors were to learn about the Peloponnesian war, the Punic Wars, and the Pacific theater of WW2.
Traditionally, our knowledge of East and South Asian history and culture has been sadly subpar because of a bias towards Western European history