Yes, indeed! Marty and swa hitting one either side of the right answer...
I would also have accepted 103, which is the total number of years between 1337 and 1475 that England and France were actually in a state of War. (c.June 1337 - c.May 1360, c.July 1369 - c.July 1389, c.August 1415 - c.August 1475). The last battle of the War was fought in 1453 but a peace treaty was only signed 22 years later.
You're up Kiwi!