Examples

• A tabard
  Tabard
  A tabard is a short coat, either sleeveless, or with short sleeves or shoulder pieces, which was a common item of men's clothing in the Middle Ages, usually for outdoors. It might be belted, or not...
  
   in the livery colors of a lord and bearing his coat of arms was a common field sign.
• A sash of colored cloth worn on the waist or over the shoulder.
• A bow of ribbon worn on the cap or hat.
  • A black bow was worn by the troops of the House of Hanover.
  • A white bow was worn by the House of Bourbon.
  • A red bow was worn by the House of Savoy.
  • An orange bow was worn by the House of Orange.
• The cockade
  Cockade
  A cockade is a knot of ribbons, or other circular- or oval-shaped symbol of distinctive colors which is usually worn on a hat.-Eighteenth century:...
  
   (made originally of ribbon, cloth, or leather) is the best known type of field sign. The national and military insignia of most of the countries of Europe still use them today.
• Scottish clans had plant badges
  Clan badge
  A clan badge, sometimes called a plant badge, is a badge or emblem, usually a sprig of a specific plant, that is used to identify a member of a particular Scottish clan. They are usually worn in a bonnet behind the Scottish crest badge, or attached at the shoulder of a lady's tartan sash...
  
   that they wore in battle to tell foe from ally.
• The Welsh leek badge (now believed to be a "St. Mary's Leek", or Dandelion) goes back to the Middle Ages. In 633 AD the Welsh were sorely pressed by the invading Saxons. They met at the Battle of Heathfield, where there was a field filled with leeks. To distinguish themselves from the enemy, the Welsh wore the leeks in their hats—and subsequently gained a great victory over their enemies. To commemorate the victory they won, the Welsh soldiers were given the right to wear a leek pinned to their caps on March 1, the feast of their national patron saint, St. David.
• Irish Protestants and Ulster Unionists still wear the orange ribbon of the House of Orange today in their caps on July 12 "King Billy's Day
  Williamite war in Ireland
  The Williamite War in Ireland—also called the Jacobite War in Ireland, the Williamite-Jacobite War in Ireland and in Irish as Cogadh an Dá Rí —was a conflict between Catholic King James II and Protestant King William of Orange over who would be King of England, Scotland and Ireland...
  
  ". This commemorates the slaughter of James II's
  James II of England
  James II & VII was King of England and King of Ireland as James II and King of Scotland as James VII, from 6 February 1685. He was the last Catholic monarch to reign over the Kingdoms of England, Scotland, and Ireland...
  
   Jacobite troops by the forces of William, Prince of Orange
  William III of England
  William III & II was a sovereign Prince of Orange of the House of Orange-Nassau by birth. From 1672 he governed as Stadtholder William III of Orange over Holland, Zeeland, Utrecht, Guelders, and Overijssel of the Dutch Republic. From 1689 he reigned as William III over England and Ireland...
  
  .
• Giuseppe Garibaldi
  Giuseppe Garibaldi
  Giuseppe Garibaldi was an Italian military and political figure. In his twenties, he joined the Carbonari Italian patriot revolutionaries, and fled Italy after a failed insurrection. Garibaldi took part in the War of the Farrapos and the Uruguayan Civil War leading the Italian Legion, and...
  
  's followers, who became the nucleus of the irregular Cacciatori delle alpi corps in 1859, wore their red shirts when they fought the Austrians.