The Navarrese Civil War of 1451-1455 pitted John II of the Kingdom of Navarre against his son and heir-apparent, Charles IV. When the war started, John II had been King of Navarre since 1425 through his first wife, Blanche I of Navarre, who had married him in 1420. By the marriage pact of 1419, John and Blanche's eldest son was to succeed to Navarre on Blanche's death. When Blanche died in 1441, John retained the government of her lands and dispossessed his own eldest son, Charles , who was made Prince of Viana in 1423. John tried to assuage his son with the lieutenancy of Navarre, but his son's French upbringing and French allies, the Beaumonteses, brought the two into conflict. John was supported by the Agramonteses. From 1451 to 1455, they were engaged in open warfare in Navarre. Charles was defeated at the Battle of Aybar in 1452, captured, and released; and John tried to disinherit him by illegally naming his daughter Eleanor, who was married to Gaston IV of Foix, his successor. In 1451, John's new wife, Juana Enríquez, gave birth to a son, Ferdinand. In 1452, Charles fled his father first to France, where vainly sought allies, and later to the court of his uncle, John's elder brother, Alfonso V at Naples. Charles was popular in Spain and John was increasingly unpopular as he refused to recognise Charles as his "first born", probably planning to make Ferdinand his heir. The Navarrese Civil War presaged the Catalan Civil War of 1462-72, in which John's ill-treatment of Charles was a precipitating event.

Question: How many years did the Navarrese Civil War last?
Answer: 4

Question: Who was born first: Charles IV or John II?
Answer: John II

Question: Who was born second: Charles IV or John II?
Answer: Charles IV

Question: How many years did the Catalan Civil War last?
Answer: 10

Question: How many years did the Navarrese Civil War last?
Answer: 4

Question: How many years were John II and Blanche I married before her death?
Answer: 21

Question: Who is Ferdinand's half brother?
Answer: Charles IV

Question: How many years did the Catalan Civil War last?
Answer: 10

Question: How many years was the Navarrese Civil War?
Answer: 4

Question: How many years was the Catalan Civil War?
Answer: 10

Question: How many years before Blanche's death was her son made Prince of Viana?
Answer: 18

Question: How many years did open warfare in Navarre last?
Answer: 4

Question: Who was John's wife last, Juana or Blanche?
Answer: Juana

Question: Who was named successor instead of Charles?
Answer: his daughter Eleanor

Question: Where did Charles flee to last?
Answer: Naples

Question: How many years did the Navarrese Civil War last?
Answer: 4

Question: How many years after John II married his wife Blanche I of Navarre did she die?
Answer: 21

Question: How many years was the open warfare in Navarre?
Answer: 4

Question: Who did John II marry first, Juana Enriquez or Blanche I of Navarre?
Answer: Blanche I of Navarre

Question: Which war happened first, The Navarrese Civil War or the Catalan Civil War?
Answer: The Navarrese Civil War

Question: Which war lasted longer, The Navarrese Civil War or the Catalan Civil War?
Answer: the Catalan Civil War

Question: How many years did the the Catalan Civil War last?
Answer: 10

Question: Which two civil wars took place between 1450 and 1475?
Answer: The Navarrese Civil War

Question: How many years after John II first wife Blanche I of Navarre die, did he marry his second wife, Juana Enriquez?
Answer: 10

Question: How many years did the Navarrese Civil War last?
Answer: 4

Question: How many years had John II been married when the war broke out?
Answer: 31

Question: How many years was Blanche married before she died?
Answer: 21

Question: How many years after Blanche died, did John have a son with his second wife?
Answer: 10