The President of Paraguay, Francisco Solano Lopez, was a huge admirer of Napoleon Bonaparte. He fancied himself a skilled tactician and excellent commander, but lacked one thing, a war. So to solve this problem, in 1864 he declared war on Paraguay’s three surrounding neighbors, Argentina, Brazil and Uruguay. The outcome of the war? Paraguay was very nearly annihilated. It is estimated that 90% of its male population died during the war, of disease, starvation and battles with enemy armies. This was perhaps one of the most needless wars in history since Lopez had almost no reason to declare war on his more powerful neighbors.
War Duration: (1864-1870) Six years.
Casualties: 400,000 on both sides.