Complex sentence: In its organization the 3d Division seemingly paralleled the structural pattern of the typical North Korean Infantry Division with the 7th, 8th and 9th Rifle Regiments forming the combat nucleus in keeping with the standard triangular organization of North Korean military formations.
Split into simpler sentences: In its organization the 3d Division seemed to parallel the structural pattern of the typical North Korean Infantry Division. The 7th, 8th and 9th Rifle Regiments formed the combat nucleus of the division in keeping with the standard triangular organization of North Korean military formations.