There at the confluence of the Akesinês and Indus he waited until Perdikkas arrived with his forces. This general in the course of his march had subjugated the Abastanoi,[171] one of the independent tribes. Meanwhile there arrived at the camp other thirty-oared galleys and transport vessels which had been built for him among the Xathroi,[172] another independent tribe of Indians whose submission he had received. From the Ossadioi[173] also, another independent tribe, came envoys offering the submission of their nation. Alexander then fixed the confluence of the Akesinês and Indus as the boundary of the satrapy of Philippos, and left with him all the Thracians and as many foot-soldiers as seemed sufficient for the defence of his province. Then he ordered a city to be founded there at the very confluence of the rivers,[174] hoping it would become a great city and make a name for itself in the world. He ordered also the construction of dockyards. At this time the Baktrian Oxyartês, the father of Alexander’s wife Roxana, arrived, and on him he bestowed the satrapy of the Parapamisadai after dismissing the previous satrap Tyriaspês, who had been reported guilty of irregularities in the exercise of his authority. Then he transported Krateros, with the bulk of the army and the elephants, to the left side of the river Indus, because the route along that bank of the river seemed easier for an army heavily accoutred, and because the tribes inhabiting those parts were not quite friendly. He sailed himself down to the capital of the Sôgdoi, where he fortified another city, constructed other dockyards, and repaired his damaged vessels. He then appointed Oxyartês and Peithôn satraps of the country which extended from the confluence of the Indus and Akesinês to the sea, together with the whole sea-board of India.[175]