A project in Honduras, which emphasized soil conservation practices and organic fertilizers, saw a tripling or quadrupling of yields.
In 445 Bleda died, and two years afterwards Attila, now sole ruler, undertook one of his most important expeditions against the Eastern empire; on this occasion he pushed southwards as far as Thermopylae, Gallipoli and the walls of Constantinople; peace was cheaply purchased by tripling the yearly tribute (which accordingly now stood at 2 100 pounds of gold, or £84,000 sterling) and by the payment of a heavy indemnity.