What are some political changes that contributed to the rise of Florence ?

Wool trade profits had provided the initial capital for the banking industry of Florence. Since the 13th century, Florentine merchants had lent money to their allies, the Pope and powerful Guelph nobles. ... At this point the rich merchants allowed Cosimo de' Medici to rise to the leadership of Florence.

not sure

c, they united with once

world war i began in 1914, after the assassination of archduke franz ferdinand, and lasted until 1918. during the conflict, germany, austria-hungary, bulgaria and the ottoman empire (the central powers) fought against great britain, france, russia, italy, romania, japan and the united states (the allied powers). to new military technologies and the horrors of trench warfare, world war i saw unprecedented levels of carnage and destruction. by the time the war was over and the allied powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

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