Teacher:In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
Teacher: Now, understand the problem? Solve this instance: Passage: Thomas of Woodstock was in command of a large campaign in northern France that followed the War of the Breton Succession of 1343–64. The earlier conflict was marked by the efforts of John IV, Duke of Brittany to secure control of the Duchy of Brittany against his rival Charles of Blois. John was supported in this struggle by the armies of the kingdom of England, whereas Charles was supported by the kingdom of France. At the head of an English army, John prevailed after Charles was killed in battle in 1364, but the French continued to undermine his position, and he was later forced into exile in England. He returned to Brittany in 1379, supported by Breton barons who feared the annexation of Brittany by France. An English army was sent under Woodstock to support his position. Due to concerns about the safety of a longer shipping route to Brittany itself, the army was ferried instead to the English continental stronghold of Calais in July 1380. As Woodstock marched his 5,200 men east of Paris, they were confronted by the army of Philip the Bold, Duke of Burgundy, at Troyes, but the French had learned from the Battle of Crécy in 1346 and the Battle of Poitiers in 1356 not to offer a pitched battle to the English. Eventually, the two armies simply marched away. French defensive operations were then thrown into disarray by the death of King Charles V of France on 16 September 1380. Woodstock's chevauchée continued westwards largely unopposed, and in November 1380 he laid siege to Nantes and its vital bridge over the Loire towards Aquitaine. However, he found himself unable to form an effective stranglehold, and urgent plans were put in place for Sir Thomas Felton to bring 2,000 reinforcements from England. By January, though, it had become apparent that the duke of Brittany was reconciled to the new French king Charles VI, and with the alliance collapsing and dysentery ravaging his men, Woodstock abandoned the siege.
 Link Information: The War of the Breton Succession was a conflict between the Counts of Blois and the Montforts of Brittany Answer: 2
Student:
How many major fighting parties were there in the War of the Breton Succession?