Long Hair

The ancient Greeks had several gods and heroes who wore their hair long, including Zeus, Achilles, Apollo, and Poseidon. Greek soldiers are said to have worn their hair long in battle. Such warriors considered it a sign of aristocracy and are said to have combed it openly in order to show off. Also, in order to keep enemies from getting a hold of it in battle, they were known to cut the front short, but leave it long in the back, where it was more out of reach. A widely held alternative interpretation of the conventional belief is that they kept it long, and simply tied it back in a style known as a ponytail in order to keep it out of their enemies' reach. The ponytail method allowed warriors, who often traveled to battle with a minimal amount of equipment in order to avoid excessively heavy loads over long marches, to keep their hair manageable with a small piece of string to hold their pony tail in place and a knife to cut the back to length with one simple slice. Around the sixth century, however, the Greek men shifted to shorter hairstyles, with the exception of the Spartans. Women in the culture remained with the longer style, which for them showed freedom, health, and wealth, as well as good behavior. In men, it was considered a sign of false pride by this time.
The Gaelic Irish (both men and women took great pride in their long hair—for example, a person could be heavily fined for cutting a man's hair short against his will. When the Anglo-Normans and the English colonized Ireland, hair length came to signify one's allegiance. Irishmen who cut their hair short were deemed to be forsaking their Irish heritage. Likewise, English colonists who wore their hair long in the back were deemed to be forsaking their role as English subjects and giving in to the Irish life. Thus, hair length was one of the most common ways of judging a true Englishman in this period. Muslims in Christian areas were ordered to keep their hair short and parted, as their longer style was considered rebellious and barbaric
was widespread among English and French men in the 11th and 12th centuries, though it was considered, mostly because of endorsement of the Roman Catholic Church, acceptable for men also to have shorter hair. The tradition was largely brought about by monarchs who rejected the shorter hairstyle, causing the people to follow. Wulfstan, a religious leader, worried that those with longer hair would fight like women, and be unable to protect England from foreign invasion. This idea can be found in later military leaders as well, such as those of the American Confederacy. Knights and rulers would also sometimes cut or pull out their hair in order to show penitence and mourning, and a squire's hair was generally shorter than a knight's. Married women who let their hair flow out in public were frowned upon, as this was normally reserved for the unwed, although they were allowed to let it out in mourning, to show their distressed state. Through these centuries it was expected of Eastern Christians to wear long hair as well as long beards, which was especially expected from clergy and monks.