The Lance (Creek) Formation is a division of Late Cretaceous (dating to about 69 - 66 Ma) rocks in the western United States. Named after Lance Creek, Wyoming, the microvertebrate fossils and dinosaurs represent important components of the latest Mesozoic vertebrate faunas. The Lance Formation is Late Maastrichtian in age (Lancian land mammal age), and shares much fauna with the Hell Creek Formation of Montana and North Dakota, the Frenchman Formation of southwest Saskatchewan, and the lower part of the Scollard Formation of Alberta.

The lances fournies (French: "lances furnished") 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 the "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.