Passage: In 1498, the Duke of Orleans became King of France as Louis XII, and immediately sought to make good his father's claim to Milan. He invaded in 1499 and soon ousted Lodovico Sforza. The French ruled the duchy until 1512, when they were ousted by the Swiss, who put Lodovico's son Massimiliano on the throne. Massimiliano's reign did not last very long. The French, now under Francis I, invaded the area in 1515 and reasserted their control at the Battle of Marignano. The French took Massimiliano as their prisoner. The French were again driven out in 1521, this time by the Austrians, who installed Massimiliano's younger brother, Francesco II Sforza.

Question: What year did the Duke of Orleans invade Milan?
1499