Serbia supplied the rebels with weapons so that they could kill the archduke. Austria-Hungary declared war on Serbia. Russia entered to defend Serbia because they both had large Slavic populations. Germany entered to defend Austria-Hungary. Alliances drew other countries in until it was a world war.
The U.S. Took them from Mexico and Frank/ Great Britan
The most famous family associated with the Renaissance is the Italian Medici family, which was based out of Florence.
The Medicis became important patrons of the arts and were very politically active.