Saint of the French Empire

Mary Cosette is a child of a wealthy family. She has a kind heart and wants to live an ordinary life with her friends and relatives. When she was 10 years old, France promulgated a law for women to join the army. Because her father had not fulfilled his dream of becoming an officer, he spent money to send Mary to an officer school; When he graduated from the military academy at the age of 16, his father was assassinated; After the death of her father, the family lost its source of income. Because of this incident, her mother spent all her assets living and drinking outside. Mary became the family's breadwinner. Can Mary break through the obstacles and live her ideal life? Hello everyone, I am a new author. Please give me your advice. Please forgive me for the slow update due to some reasons.