1453, the fell after an Ottoman army stormed Constantinople
I believe the answer is: Hoboes
Hoboes is the collection of people who lost their home due to the massive unemployment which exist during the great depression. Since they can afford to rent a place, they are forced travel along rail lines and make small shelter from leftover metals as a protection from the rain.
The rebellion against unfair British taxation would blossom into a country whose economic and military might is felt all over the globe today.
Yoshiaki asked for protection(after the fall of Askiaga shogunate) from the Mori clan in western Japan which created a treat towards the rest of Japan.