The lance fournie (French: "equipped lance") was a medieval equivalent to the modern army squad that would have accompanied and supported a man-at-arms (a heavily armoured horseman popularly known as a "knight") in battle. These units formed companies under a captain either as mercenary bands or in the retinue of wealthy nobles and royalty. Each lance was supposed to include a mixture of troop types (the men-at-arms themselves, lighter cavalry, infantry, and even noncombatant pages) that would have guaranteed a desirable balance between the various components of the company at large; however, it is often difficult to determine the exact composition of the lance in any given company as the available sources are few and often centuries apart.
A lance was usually led and raised by a knight in the service of his liege, yet it is not uncommon in certain periods to have a less privileged man, such as a serjeants-at-arms, lead a lance. More powerful knights, also known as a knight bannerets, could field multiple lances.