Elements of Military Art and Science / Or, Course Of Instruction In Strategy, Fortification, Tactics Of Battles, &C.; Embracing The Duties Of Staff, Infantry, Cavalry, Artillery, And Engineers; Adapted To The Use Of Volunteers And Militia; Third Edition; With Critical Notes On The Mexican And Crimean Wars.

by H. W. Halleck

Joubert became adjutant-general at twenty-five, general of brigade at twenty-six, general of division at twenty-eight, and general-in-chief of the army of Italy at twenty-nine. He died at thirty.

Victor was a chef-de-bataillon at twenty-seven, general of brigade at twenty-nine, and general of division at thirty-two.

Murat was a lieutenant at twenty, and passing rapidly through the lower grades, he became a general of brigade at twenty-five, and a general of division at twenty-seven.

Mortier was a captain at twenty-three, adjutant-general at twenty-five, general of brigade at thirty, and general of division at thirty-one.

Macdonald was a colonel at twenty-seven, a general of brigade at twenty-seven, and a general of division at thirty.

Marmont was a captain at twenty-one, chef-de-bataillon at twenty-two, general of brigade at twenty-four, inspector general at twenty-seven, and general-in-chief of an army at thirty-two.

Bernadotte was a colonel at twenty-eight, general of brigade at twenty-nine, and general of division at thirty.

Lefebvre was made a captain at the organization of the army in 1793; he became a general of brigade at thirty-eight, and general of division at thirty-nine.

Bessières entered the army at twenty-six, became a colonel at thirty, general of brigade at thirty-two, and general of division at thirty-four. He died at forty-seven.

Duroc was a captain at twenty-three, chef-de-bataillon at twenty-six, colonel and chef-de-brigade at twenty-seven, and general of division at thirty. He died at forty-one.