not advance farther south. The two sides were now back on their pre-1369 borders. Viceroy ( 1371/72–1384) Truce According to the Razadarit Ayedawbon, it was the king that first sued for peace with the rebel brothers. Despite his success in retaking Donwun, he was still concerned about a potential interference by Lan Na. (The marriage alliance between the two states was at a breaking point. His daughter Tala Mi Thiri was never happy at Chiang Mai, and had been asking her father to bring her back for several years.) The brothers too were interested in an agreement that would preserve their status. The two sides then agreed to a treaty that called for U to recognize the brothers as the rightful viceroys of Martaban and Bassein (Irrawaddy delta) provinces, and to pay them 10 viss (16.33 kg) of gold and ten elephants in exchange for the brothers' recognition of U as their sovereign as well as brokering of an agreement with Lan Na to maintain peace. As the Razadarit Ayedawbon recounts, U realized the absurdity of the overlord paying tribute to the vassals but he ultimately decided to swallow his pride, and agreed to the terms. On the other hand, Byattaba and Laukpya realized that they needed Lan Na's support in order to neutralize Pegu's stronger position. The brothers sent 15 viss (24.49 kg) of gold in total to retain Chiang Mai's support. The king of Lan Na sent back Tala Mi Thiri to Pegu. Nominal vassal The treaty held until Binnya U's death in 1384. Though officially viceroys, Byattaba and Laukpya ruled their territories like sovereigns. For their part, they did not get involved in the affairs of Pegu even when the king gradually withdrew from governing due to his long illness. When U's 15-year-old son Binnya Nwe raised a rebellion in 1383, neither viceroy interfered. When princess-regent Maha Dewi asked them to contribute troops to put down the rebellion, each sent a regiment to ensure that the fighting would not spill over to their territories. But neither joined the actual fighting. Back in rebellion (1384–1388) Independent but neutral In January 1384, the Pegu court chose the rebel son Nwe, who took the reign name of Razadarit. Byattaba and Laukpya did not acknowledge the new king, who at his accession had not yet turned 16. It was not just them. Even rulers of the northern Martaban province who were