The Battle of Soissons was fought on 15 June 923 between an alliance of Frankish insurgent nobles led by Robert I, elected king in an assembly the year prior, and an army composed of Lotharingians, Normans, and Carolingian forces under King Charles III's command.战斗发生在埃纳附近的苏瓦松。罗伯特被杀，但他的军队赢得了战争。查尔斯被维尔曼杜瓦的赫伯特二世囚禁，并被俘虏直到他于 929 年去世。罗伯特的女婿勃艮第公爵鲁道夫接替他成为西法兰克的统治者。