In the United States Armed Forces, a brigadier general is a one-star general officer in the United States Army, Marine Corps, Air Force, and Space Force.
Brigadier General John B. Bellinger, photographed in 1905. Note the one-star shoulder insignia.
In the United States Armed Forces, a major general is a two-star general officer in the United States Army, Marine Corps, Air Force, and Space Force.
Brigadier general (United States)
…a one-star general officer in the United States Army, Marine Corps, Air Force, and Space Force. A brigadier general ranks above a colonel and below a major general. The pay grade of brigadier general is O-7. It is equivalent to the rank of rear admiral (lower half) in the other United States uniformed services…
Lafayette in a uniform of a major general of the Continental Army.
Maj Gen Anne B. Gunter (Air Force, 2023), wearing two-star insignia.