The Tenbun no ran was a feud between [[Date Tanemune]] and his son, [[Date Harumune]] when Tanemune attempted to adopt another of his sons, [[Date Sanemoto]], to the [[Uesugi clan]] which Harumune steadfastly opposed. What was initially a disagreement eventually escalated into a small internal clan war. Though Tanemune had the advantage for some time, Harumune gained the support of the Soma and Asihina clans, turning the feud in his favor. Eventually, Tanemune lost and was forced to retire in [[1548]], allowing Harumune to take control of the clan. | The Tenbun no ran was a feud between [[Date Tanemune]] and his son, [[Date Harumune]] when Tanemune attempted to adopt another of his sons, [[Date Sanemoto]], to the [[Uesugi clan]] which Harumune steadfastly opposed. What was initially a disagreement eventually escalated into a small internal clan war. Though Tanemune had the advantage for some time, Harumune gained the support of the Soma and Asihina clans, turning the feud in his favor. Eventually, Tanemune lost and was forced to retire in [[1548]], allowing Harumune to take control of the clan. |