General

Naval warfare, WW II, & civil war.

Yes; mainly wars of the 20th century interest me, studied WW1 & 2 pretty extensively in high school.

American history Civil war, WWII and Vietnam mostly.
Ancient and medieval Europe as well

History fan here. I have enjoyed reading, deep diving into a variety of histories over the years from Ancient Rome vs Carthage to medieval (including The Borgias series on NFLX, which is of course more of a dramatized history), Napoleanic era and esp WWI and WWII. Some Vietnam also as it was a big thing in my youth.

I’m a big fan of world history from 1896-1945.

I'm huge into the history of brewing, wine making, and anything booze related.

I majored in music history and minored in bread history

Personally find palaeontology interesting as well as world war 2 and South African history

Social studies was my strongest subject in school besides science. When I was a kid I wanted to be a paleontologist.

I have collected a stash of WWII memorabilia some Vietnam battle field relics as well.
Have a few cold war era East German caps and uniform pins.
I find this stuff in antique stores and junk shops. I have some WWII and Vietnam era ammo cans.
I have started collecting Army field jackets recently and have 2 Vietnam era OD green and one tiger stripe field jackets.
Have 2 more more recent one is woodland camo and the other is desert camo.
Have a complete chemical jacket and pants from Desert storm time frame.
I find this stuff interesting so I collect it.