Complex sentence: There they became the Heer's 250th Infantry Division, and were initially divided into four infantry regiments, as in a standard Spanish division; however, to aid their integration into the German supply system, they soon adopted the standard Heer model of three regiments.
Split into simpler sentences: There they became the Heer's 250th Infantry Division, and were initially divided into four infantry regiments, as in a standard Spanish division. To aid their integration into the German supply system, they soon adopted the standard Heer model of three regiments.