100 Years War period, 14th century. See Historical Guide to Arms and Armor, Bull and North, P.70 bottom and text where these are described as especially effective against horses. The topic of killing horses in battle is largely and conveniently ignored in literature and the arts. The hail of arrows, so effectively used at Agincourt and elsewhere consists of a random shower on the grouped enemy. As the men were protected to various extents by armor, and the target presented by a horse was far larger than the man, it must be concluded that the primary purpose was to disable the horses. That done, cavalry were reduced to infantry, in armor and bearing weapons designed for mounted use. This example, 2 ½” length with the barbed point ridged on one side and near flat on the other as typical.