What was the main conflict during John I's ascension to the throne?
Succession war with Castile
War with England
War with France
War with the Moors
Answer
The main conflict during John I's ascension to the throne was a succession war with Castile. His victory in this war preserved Portugal's independence and allowed him to establish the House of Aviz on the Portuguese throne.
Unraveling the Reign of John I of Portugal: The Pioneering Monarch of the House of Aviz