A Coup d'état was a French story about a coup during the July Revolution in 1894. The protagonist of the novel was Jean-Francois Pattier, a representative of the Paris municipal government. Before the coup, he was an official in the French municipal government responsible for managing public affairs. After the coup, he joined the ranks of the coup and became a general of the revolutionary army. The novel showed the political turmoil and people's living conditions in French society before and after the coup from the perspective of Pattier. During the coup, Pattier and other generals of the revolutionary army fought at all costs to maintain political stability and freedom in France. They reflected and criticized the corruption and disloyalty within the army. The novel was based on Patier's personal experience. Through the description of the coup and the reflection of French politics, it showed the complexity and profundity of the July Revolution in France. At the same time, it also reflected the various problems of French society at that time, which had strong social significance and historical value.