Why did Louis IV seek control of Brandenburg for his eldest son?

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Louis IV sought control of the Margravate of Brandenburg for his eldest son, Louis, primarily as a strategic move to expand his family's territorial power. Following the extinction of the senior Ascanian branch of the Brandenburg dynasty in 1320, the electorate was left in a state of abeyance and disunity. By April 1323, Louis IV took advantage of this power vacuum to invest his son with the territory, thereby securing it for the House of Wittelsbach.12