When does taizong want his officials to train the people for war? in the springtime when they are not busy farming during peacetime after war has begun

Li shimin, the second emperor of Taizung empire was an ardent scholar of confuciusm. He taught that people should be taught how to fight in war  when they are not busy fighting.he referenced confuciusm which articulates that taking untrained people to war is throwing them away.

In 911, a group of vikings lead by rollo besieged paris and chartres. after a victory near chartres on 26 august, charles decided to negotiate with rollo. the talks were led by hervé, the archbishop of reims. this resulted in the treaty of saint-clair-sur-epte, which granted rollo and his soldiers all the land between the river epte and the sea. it also granted him brittany, "for his livelihood". at the time, brittany was an independent land which france had not been able to conquer. in exchange, rollo promised the king his loyalty and military assistance when needed. also rollo also agreed to be baptised and to marry gisela, the king's daughter. the territory given rollo is about the same as upper normandy. this would grow to become normandy under rollo's descendants. - wikepedia