The Resolute Returned is an American event regarding 
United Kingdom. American sailors have found a lost British ship and returned it to the rightful owners.
It can happen anytime between 1856 and 1859 with a mean time to happen of 5 months, which decreases by 25% after 1857 and again by 5% after 1858.
It gives 
USA 5 prestige and improves the relation between Great Britain and USA by 100.