Historical wars? Depends on the context and period. Fictional wars? Sure. West is centered round a war (or at least a breakdown in the existing status quo) and I'm looking forward to exploring how pressures produced by that situation affect characters in the story-- and it really does at certain times. War makes a great petri dish for character development and world building and can also offer a lot in the way of interesting plot twists too, if you organise it right.
At the same time, though, I wasn't a fan of war stories like Attack On Titan because there was just toooo muuuuch angst. It became so depressing! I couldn't believe it. I've also read books with battle scenes so long I skipped them, referring back when absolutely necessary (looking at you, Fencer Trilogy).
Loved the wars in all the LOTR films because there were truck loads of character development both during and in between. When someone died, you really felt it, and when you thought someone was going to get hurt you were genuinely anxious for them. Or at least I was. I know some people didn't 'get' the films and were very confused about all the locations, which is another pitfall you'd have to watch out for I suppose. Not only that, but the wars in LOTR were also funny. I love stories with a good sense of humour and that film series had just the right touch.
With regards to your Q, the war in West is between two sides of a fictional world, except no one's really prepared for it, no one really knows it's happening, and the people who can take care of it are missing. One of my first ever story ideas (and one I dedicated a lot of time to) was also about a war, so I guess when it comes to plot devices large scale battle is my weapon of choice.