A primary infantry weapon of 15th/16th Century Korean Infantry Units, The Jangchang Spear was similar in type and use as the European Menullion Pike Spear. Ranging in length from 15 to 25 feet long, they were made of strong (yet flexible) Yew wood. The weapon featued a double-edged kinife-like extension spearhead that was 6 to 10 inches long. Used in traditional Phalanx attack formation, like the traditional Pike, they could be placed on the ground (anchored by the soldiers foot). This stability was critical against mounted attack. The Jangchang was not used as a throwing instrument due to it's overall length.