Complex sentence: Of the 12 full generals in the Army, 9 were removed from active service by the end of April, including Kōdō-ha members Araki, Mazaki, Kawashima, and Honjō.
Split into simpler sentences: Of the 12 full generals in the Army, 9 were removed from active service by the end of April. The generals removed included Kōdō-ha members Araki, Mazaki, Kawashima, and Honjō.