A mechanized unit, often used in construction or to carry weapons too substantial for a cyborg or power-armor-equipped soldier to carry, in situations or across terrain too broken for tanks. The distinction between heavy power armor and a light lancer is a point of contention, but in general, powered armor is worn, while lancers have pilots and control systems. They require training to use and years to master.
Lancers with crews numbering in the dozens or hundreds are often called Mobile Fortresses, or sometimes just MFs by the soldiers facing them.
For a list of lancer types, see the lancer category page.