It is not certain whether this was part of a particular moved against Sri Lankan merchants, or a general closing down of Baganese borders. Whatever the reason, Parākramabāhu was incensed. Assembling a fleet at Pallavavanka, he dispatched to Bagan a formidable force. The size of the army is not known, but it is recorded as containing a year's supply of grains, specially modified arrows, and Sri Lanka's fearsome war elephants. Despite setbacks en route, including the sinking of one ship and the loss of a few others, the army arrived at the city of Kusumiya (modern Pathein) on the banks of the Bago river, and captured it. Thereafter, the armies captured several other cities, including Arimaddhanapura, killed Narathu, and restored relations between the two countries to normal.