We tend to buy alcohol as we want it rather than keeping a full bar. Mostly because if it is there, we would drink it.
I'm trying to remember what we kept on hand when we lived in a trailer. Minimum storage. spices, maybe a dozen at the most, which trust me, was cutting back. We gave up salt and pepper except for kosher salt and peppercorns (and we've never gone back) Thyme and sage. Lawry's seasoning, and Cavendar's.
We always had a can of tomatoes and one of tomato paste. There was always a can of beans of some kind. There was always some kind of pasta, and some kind of rice. Always some sort of dry chicken stock. The latter is a real staple to me; over the years I've found different brands depending on where I've lived. I use it in place of salt in some dishes, make rice or pasta with it.
Being from a military family, we know about this stuff.