 At the time of his birth, the warrior-class of the nation was highly undermined and deprived of the luxuries that its civilian and scholar counterparts were able to see excessively.The young Gyeong began his military training at the age of 15, and served under the regimes of both Yi Ui-bang and Jeong Jung-bu.When his father died, he took charge of his household and began helping the poor, and made the decision of using the private army that his father had built.