Wikipedia
The Sherden (Egyptian šrdn, š3rd3n3 or š3rdyn3, Ugaritic šrdnn(m) and trtn(m), possibly Akkadian še–er–ta–an–nu; also glossed “Shardana” or “Sherdanu”) are one of several groups of " Sea Peoples" who appear in fragmentary historical and iconographic records ( Egyptian and Ugaritic) from the Eastern Mediterranean in the late second millennium BCE.
On reliefs they are shown carrying a round shield and spear, dirk, or sword, perhaps of Naue II type. In some cases they are shown wearing corselets and kilts, but their key distinguishing feature is a horned helmet which, in all cases but three, features a circular accouterment at the crest. At Medinet Habu the corselet appears similar to that worn by the Philistines. The Sherden sword, it has been suggested by archaeologists since James Henry Breasted, may have developed from an enlargement of European daggers, and been associated with the exploitation of Bohemian tin. Robert Drews has recently suggested that use of this weapon amongst groups of Sherden and Philistine mercenaries made them capable of withstanding attacks by chariotry, making them valuable allies in warfare, though Drews' theory has been widely criticized by contemporary scholars.