KUB XIX 9, a text dating to the reign of Hattušili III, has long been regarded as an important source of information on the chronology of the reign of Hattušili's grandfather Šuppiluliuma I. The text makes reference to the following events in Šuppiluliuma's career: (1) campaigns in Anatolia, allegedly covering a period of 20 years and devoted to the reconquest of territories lost to Hittite control prior to Šuppiluliuma's accession, (2) a First Syrian War, (3) the appointment of Šuppiluliuma's sons Telipinu and Piyaššili/Šarri-Kušuh as kings in the Lands of Aleppo and Carchemish (respectively), (4) a Second Syrian War, allegedly of 6 years' duration.
The information contained in this document, although not entirely free from problems of interpretation, is to a large extent confirmed and amplified in various other documents relating to Šuppiluliuma's reign. The most notable of these is the so-called Deeds of Šuppiluliuma, a biographical account of Šuppiluliuma's achievements composed by his son Muršili II. However, the usefulness of this document, within the context of a study of the chronology of Šuppiluliuma's reign, is limited by a number of factors.