Instead of declaring war, Iran and Rome agreed to come to terms through diplomacy. An agreement was made to partition Armenia. The boundary stretched through Theodosiopolis in the north and Amida in the south, which meant that most of Armenia remained in Sasanian hands, including the two Arsacid capitals of Artaxata and Dvin. With this treaty, the Romans also fully acknowledged Iranian hegemony over all of Iberia. When this treaty exactly took place is unsure; most scholars believe the treaty was made in 387, whilst a few others state 384 or even in 389 or 390. Both sides were to cooperate in the defense of the Caucasus, with the Romans agreeing to pay the Iranians roughly 500 lbs (226 kg) of gold at irregular intervals. While the Romans saw this payment as political allocations, the Iranians saw it as tribute.