Disputes over the interpretation of the treaty led the Spartans to dispatch ambassadors to Athens with full powers to arrange all unsettled matters. The Athenians initially received these ambassadors well, but Alcibiades met with them in secret before they were to speak to the ecclesia (the Athenian Assembly) and told them that the Assembly was haughty and had great ambitions. He urged them to renounce their diplomatic authority to represent Sparta, and instead allow him to assist them through his influence in Athenian politics. The representatives agreed and, impressed with Alcibiades, they distanced themselves from Nicias, despite him being sincere in wanting to reach an agreement with the Spartans. The next day, during the Assembly, Alcibiades asked them what powers Sparta had granted them to negotiate and they replied, as agreed, that they had not come with full and independent powers. This was in direct contradiction to what they had said the day before, and Alcibiades seized on this opportunity to denounce their character, cast suspicion on their aims, and destroy their credibility. This ploy increased Alcibiades' standing while embarrassing Nicias, and Alcibiades was subsequently appointed General. He took advantage of his increasing power to orchestrate the creation of an alliance between Argos, Mantinea, Elis, and other states in the Peloponnese, threatening Sparta's dominance in the region. This alliance, however, was ultimately defeated in 418 BC at the Battle of Mantinea.