 Yongle's reign also saw the rearrangement of the dynasty's frontiers that led to all but one of the eight outer garrisons being abolished to cut expenses, thereby sacrificing a vital foothold in the steppe transitional zone.After Yongle's death in 1424, the Ming abandoned the last garrison at Kaiping (the former Yuan capital also known as Xanadu) in 1430.The removal of these garrisons would have long-term consequences, as Ming foreign policy turned increasingly inward and defence became preferred over offence, especially after taking into consideration the cost to maintain the outlying garrisons.