Meaning: Part of an army.
"when they which were of the lefte wynge saw that the right side was discomfited they followed Judas behind."
1 Maccabees 9:16 (Coverdale 1535)
Meaning: Liberal political section. The French National Assembly set radicals on the left, and conservatives on the right.
Matt 25:31 When the Son of man shall come in his glory, and all the holy angels with him, then shall he sit upon the throne of his glory: [32] And before him shall be gathered all nations: and he shall separate them one from another, as a shepherd divideth his sheep from the goats: [33] And he shall set the sheep on his right hand, but the goats on the left.