Final answer:
Revolutionary fervor enabled the French revolutionary armies to march off and defend the Republic using new tactics and rapid training of dedicated forces, signaling a shift in military strategy and the rise of nationalism.
Step-by-step explanation:
Spurred by revolutionary fervor, French revolutionary armies marched off to defend the Republic. Young officers developed effective new tactics to win battles with masses of rapidly trained but dedicated forces. During the period following the French Revolution, the elimination of noble privilege allowed for mass conscription and the transformation of the officer corps into a meritocracy, thus enabling the rapid rise of capable individuals like Napoleon. These armies, singing la Marseillaise and fighting for the fatherland, were a manifestation of budding French nationalism and a new way of engaging in warfare. This evolving approach to battle and the flexibility of French military structures confused and overwhelmed many opponents, paving the way for numerous French victories across Europe.