The Russians were quick to recover. Grand Duke Nicholas, commander of the Russian troops, sent an urgent telegram to Prince Carol I of the newly independent Principality of Romania asking for Romanian support. The Romanian Army sent 40,000 soldiers with 112 guns, modern Krupp pieces equal to those of the Ottomans, and Carol I was named commander of the joint Russian-Romanian troops around Plevna. By now, the Allied Army numbered 80,000 soldiers against an Ottoman force of around 40,000. Against Carol's wishes, the Allies launched another large scale attack on Plevna on 11 September. After two days of fighting, even though the Allies had managed to dislodge the Ottomans from a few of the redoubts, almost all of them were recaptured, with the exception of Grivitza 1, taken by the Romanian soldiers.