 Macdonald and Younghusband discussed their differences, and on 12 June the Tibet Field Force marched out of New Chumbi.Once the obstacle of Gyantse Dong was cleared, the road to Lhasa would be open.Gyantse Dzong was, however, too strong for a small raiding force to capture, and as it overlooked British supply routes, it became the primary target of Macdonald's army.