of Ekallatum, while Shamshi-Adad I remained in Šubat-Enlil. Shamshi-Adad I put his second son, Yasmah-Adad, on the throne in Mari. With the annexation of Mari, Shamshi-Adad I had carved out a large empire encompassing much of Syria, Anatolia, and the whole of Upper Mesopotamia (this empire often referred to as either the "Kingdom of Upper Mesopotamia" or the "Upper Mesopotamian Empire".) Shamshi-Adad I proclaimed himself as "King of All" (the title had been used by Sargon of the Akkadian Empire c. 2334 BC – c. 2279 BC). King Dadusha of Eshnunna (fl. c. 1800 BC – c. 1779 BC), made an alliance with Shamshi-Adad I to conquer the area between the two Zab rivers c. 1781 BC. This military campaign of joint forces was commemorated on a victory stele which states that Dadusha gave the lands to Shamshi-Adad I. Shamshi-Adad I later turned against Dadusha by attacking cities including Shaduppum, Nerebtum and Andarig. On inscriptions Shamshi-Adad I boasts of erecting triumphal stelae on the coast of the Mediterranean, but these probably represent short expeditions rather than any attempts at conquest. His campaigns were meticulously planned, and his army knew all the classic methods of siegecraft, such as encircling ramparts and battering rams. The 5th year name of Dadusha's son and successor, Ibal-pi-el II records the death of Shamshi-Adad. Family While Ishme-Dagan I was probably a competent ruler, his brother Yasmah-Adad appears to have been a man of weak character; something the disappointed father (Shamshi-Adad I) was not above mentioning: Shamshi-Adad I wrote in another letter: Shamshi-Adad I clearly kept a firm control on the actions of his sons, as shown in his many letters to them. At one point he arranged a political marriage between Yasmah-Adad to Beltum, the princess of his ally in Qatna. Yasmah-Adad already had a leading wife and had put Beltum in a secondary position of power. Shamshi-Adad I did not approve and forced his son to keep Beltum in the palace in a leading position. Shamshi-Adad I sent a letter on a tablet to Ishi-Addu (Beltum's father, the King of Qatna) in which he discussed their alliance, the attacks of their enemies, and the successful marriage between their children. In it Shamshi-Adad I wrote: Reign Shamshi-Adad I was a great organizer and he kept firm controls on all matters of state, from high policy down to the appointing of officials and the dispatching of provisions.