page_title: Light infantry
section_title: Ancient history
hierarchical_section_title: Light infantry / History / Ancient history
caption_attribution_description: English: Agrianian Peltast by Johnny Shumate For more information about illustrations, email shumate_j@bellsouth.net
context_page_description: Light infantry is a designation applied to certain types of foot soldiers throughout history, typically having lighter equipment or armament or a more mobile or fluid function than other types of infantry, such as heavy infantry or line infantry. Historically, light infantry often fought as scouts, raiders and skirmishers—soldiers who fight in a loose formation ahead of the main army to harass, delay, disrupt supply lines, and generally "soften up" an enemy before the main battle. After World War II, the term "light infantry" evolved, and now generally refers to rapid-deployment units that specifically emphasize speed and mobility over armor and firepower. Some units or battalions that historically held a skirmishing role have kept their designation "light infantry" for the sake of tradition.
context_section_description: The concept of a skirmishing screen is a very old one and was already well-established in Ancient Greece and Roman times in the form, for example, of the Greek peltast and psiloi, and the Roman velites. As with the so-called "light infantry" of later periods, the term more adequately describes the role of such infantry rather than the actual weight of their equipment. Peltast equipment, for example, grew steadily heavier at the same time as hoplite equipment grew lighter. It was the fact that peltasts fought in open order as skirmishers that made them light infantry and that hoplites fought in the battle line in a phalanx formation that made them heavy infantry.
caption: Agrianian peltast, c. 4th century BC
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