The Nor Yungas Road, renowned for its danger, was 
The Nor Yungas Road, renowned for its danger, was built by POWs from this country. One leader of this country delayed a shipment from England until he could learn English and read the ship's books, which he did for all incoming ships. That leader (*)  pursued a policy of forced interracial marriage. Eliza Lynch, the mistress of one of his successors, was forced to dig that successor's grave. This nation's Children's Day falls on the anniversary of a battle at which it used child soldiers with painted beards and sticks to fight modern infantry regiments during a war in which they lost the Siege of Humaita. For ten points, name this country that lost 2⁄3 of its male population in the War of the Triple Alliance.
The Nor Yungas Road, renowned for its danger, was built by POWs from this country.
Paraguay