The Battle of Lomas Valentinas (also known as the Battle of Ita Ybate) was fought in the Central Department of Paraguay on December 21–27, 1868. The Paraguayan Army, led personally by President Francisco Solano Lopez, were decisively defeated, though he managed to escape. On December 30, 1868, the Paraguayan garrison at Angostura, with 1,907 men, surrendered to the Allies.