Although the Gazette's editor omitted the signature for publication, Galois was expelled.Although his expulsion would have formally taken effect on 4 January 1831, Galois quit school immediately and joined the staunchly Republican artillery unit of the National Guard.
Though his first attempt was refused by Cauchy, in February 1830 following Cauchy's suggestion he submitted it to the Academy's secretary Joseph Fourier, The prize would be awarded that year to Niels Henrik Abel posthumously and also to Carl Gustav Jacob Jacobi.
At around the same time, nineteen officers of Galois' former unit were arrested and charged with conspiracy to overthrow the government.
In April 1831, the officers were acquitted of all charges, and on , a banquet was held in their honor, with many illustrious people present, such as Alexandre Dumas.
He soon became bored with his studies and, at the age of 14, he began to take a serious interest in mathematics.
He found a copy of Adrien-Marie Legendre's Éléments de Géométrie, which, it is said, he read "like a novel" and mastered at the first reading.