The Chronicle Concerning Year Three of Neriglissar (ABC 6) is one of the historiographical texts from ancient Babylonia. It deals with king Neriglissar (= Nergal-šarra-usur) and his war in the far west in 557/556 BCE.
This chronicle, like Chronicles 2, 4, 9, and 15, is inscribed on a tablet, BM 25124 (98-2-16, 178), which has the shape of a Neo-Babylonian business tablet. It measures 58 mm wide and 46 mm long. There are only minor lacunae in the tablet. Unlike other chronicles, this text is very rich in detail.
For a very brief introduction to the literary genre of chronicles, go here. The translation on this webpage was adapted from A.K. Grayson, Assyrian and Babylonian Chronicles (1975) and Jean-Jacques Glassner, Mesopotamian Chronicles (Atlanta, 2004).
 The third year (557/556): on the Nth day of the month [...], Appuašu, the king of Pirindu,
 mustered a large army and set out to plunder and sack
 Syria. Neriglissar
 mustered his army and marched to Hume [Cilicia] to oppose him.
 Before his arrival Appuašu placed
 the army and cavalry which he had organized
 in a mountain valley ambush.
 When Neriglissar reached them he inflicted a defeat upon them
 and conquered the large army. The army and numerous horses
 he captured. He pursued Appuašu
 for a distance of fifteen double-hours and marched through difficult mountains, where men must walk in single file,
 as far as Ura, the royal city.
 He captured him, seized Ura, and sacked it.
[15-17] When he had marched for a distance of six double hours through rough mountains and difficult passes, from Ura to Kirši - his forefather's royal city -
 he captured Kirši, the mighty city, his royal metropolis.
 He burnt its wall, its palace, and its people.
 Pitusu, a land in the midst of the ocean,
 and six thousand combat troops who were stationed in it
 he captured by means of boats. He destroyed their city
 and captured their people. In that same year from the pass
 of Sallune to the border
 of Lydia he started fires. Appuašu
 fled, so he did not capture him. In the month of Addaru,note[February/March 556.] the king of Akkad
 went home.