In 1500, Leonardo continued to Venice. The 1499 French invasion of Lombardy and Sforza's attempt to mount a counter-attack out of exile had embroiled much of the Mediterranean coast in war. Venice itself was currently at war with the Ottoman Empire. Leonardo went to the Senate of Venice and offered his services as an engineer. He wanted to construct a kind of mobile dam that would allow Venetian forces to draw the Turks into the Isonzo river valley and then flood the valley, wiping out the enemy forces. The Senate did not act on his plan. He also had devised a diving apparatus, and wanted to initiate an underwater raid on the Ottoman fleet, drilling holes in the bottoms of their ships. His design was remarkably similar to modern scuba gear. Neither of these plans
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