Prepare a campfire and let it burn until the coals are hot (some low flame is ok). Set a large Dutch oven over the fire. Alternatively, if you have a cooking tripod for campfire cooking, you can use that.
Add the oil and let it heat for 1 minute.
Dump the ground beef into the pot and season with salt and pepper. Cook, stirring frequently to break up the meat, until the meat is browned all over, about 10 minutes.
Stir in the onion, pepper, and garlic. Cook, stirring frequently until the onion is translucent and the pepper is starting to soften, about 10 minutes.
Sprinkle in the spices and cook, stirring, for 1 minute.
Pour in the beer and add the entire can of tomatoes, juices and all. Mix it well to combine everything and let the chili come to a simmer. Cover the Dutch oven and let it cook for 1 hour, replenishing the fire as needed to maintain hot coals.
Remove the lid and stir in the kidney beans. Let it cook until the beans are warmed through, about 5 minutes. Taste and adjust the seasoning, if needed.
Remove from the heat and serve, topped with all your favorite fixings, if desired.