Complex sentence: On 6 January 1941, he was ordered to form XXXXVIII Army Corps (motorized), and became its commander, along with a promotion to General der Panzertruppe, on 1 April 1941.
Split into simpler sentences: On 6 January 1941, he was ordered to form XXXXVIII. Armeekorps (motorized), and became its commander, along with a promotion to General der Panzertruppe, on 1 April 1941.