Champion warfare refers to a type of battle, most commonly found in the epic poetry

Epic poetry

An epic is a lengthy narrative poem, ordinarily concerning a serious subject containing details of heroic deeds and events significant to a culture or nation. Oral poetry may qualify as an epic, and Albert Lord and Milman Parry have argued that classical epics were fundamentally an oral poetic form...

 and myth

Mythology

The term mythology can refer either to the study of myths, or to a body or collection of myths. As examples, comparative mythology is the study of connections between myths from different cultures, whereas Greek mythology is the body of myths from ancient Greece...

 of ancient history, in which the outcome of the conflict is determined by an individual duel between the best soldiers ("champions") from each opposing army. Champion warfare can also refer to a battle in which armies actually engage, but champions within the armies fight so effectively as to single-handedly carry the sway of battle, such as in the Iliad

Iliad

The Iliad is an epic poem in dactylic hexameters, traditionally attributed to Homer. Set during the Trojan War, the ten-year siege of the city of Troy by a coalition of Greek states, it tells of the battles and events during the weeks of a quarrel between King Agamemnon and the warrior Achilles...

.

Champion warfare in literature

• Numerous instances of champion warfare can be observed in Homer's Iliad
  Iliad
  The Iliad is an epic poem in dactylic hexameters, traditionally attributed to Homer. Set during the Trojan War, the ten-year siege of the city of Troy by a coalition of Greek states, it tells of the battles and events during the weeks of a quarrel between King Agamemnon and the warrior Achilles...
  
  , most notably the climactic battle between Achilles
  Achilles
  In Greek mythology, Achilles was a Greek hero of the Trojan War, the central character and the greatest warrior of Homer's Iliad.Plato named Achilles the handsomest of the heroes assembled against Troy....
  
   and Hector
  Hector
  In Greek mythology, Hectōr , or Hektōr, is a Trojan prince and the greatest fighter for Troy in the Trojan War. As the first-born son of King Priam and Queen Hecuba, a descendant of Dardanus, who lived under Mount Ida, and of Tros, the founder of Troy, he was a prince of the royal house and the...
  
  , although there are many more.
• Champion warfare is a common theme in the early books of Livy
  Livy
  Titus Livius — known as Livy in English — was a Roman historian who wrote a monumental history of Rome and the Roman people. Ab Urbe Condita Libri, "Chapters from the Foundation of the City," covering the period from the earliest legends of Rome well before the traditional foundation in 753 BC...
  
  's history of Rome
  History of Rome
  The history of Rome spans 2,800 years of the existence of a city that grew from a small Italian village in the 9th century BC into the centre of a vast civilisation that dominated the Mediterranean region for centuries. Its political power was eventually replaced by that of peoples of mostly...
  
   Ab Urbe Condita
  Ab urbe condita
  Ab urbe condita is Latin for "from the founding of the City ", traditionally set in 753 BC. AUC is a year-numbering system used by some ancient Roman historians to identify particular Roman years...
  
  ("From the Founding of the City"), including the story of the famous triplets of the Horatii
  Horatii
  According to Livy, the Horatii were male triplets from Rome. During a war between Rome and Alba Longa during the reign of Tullus Hostilius , it was agreed that settlement of the war would depend on the outcome of a battle between the Horatii and the Curiatii...
  
   and Curiatii families and the great champion Horatius Cocles
  Horatius Cocles
  Publius Horatius Cocles was an officer in the army of the ancient Roman Republic who famously defended the Pons Sublicius from the invading army of Lars Porsena, king of Clusium in the late 6th century BC, during the war between Rome and Clusium.-Background:...
  
  .
• In the Bible
  Bible
  The Bible refers to any one of the collections of the primary religious texts of Judaism and Christianity. There is no common version of the Bible, as the individual books , their contents and their order vary among denominations...
  
  , the battle between David and Goliath is an example of champion warfare.