The tradition of coregency among Lithuanian rulers enabled them to simultaneously pursue a western policy towards Poland and the Monastic State of the Teutonic Knights and an eastern one towards the Russian powers, for example the Principality of Moscow, the Novgorod Republic, and the Pskov Republic.
The established custom among Lithuanian leaders allowed them to maintain dual diplomatic relationships simultaneously: one with Western Poland and the Monastic State of the Teutonic Knights, while another with Eastern Russia, encompassing the Principality of Moscow, the Novgorod Republic, and the Pskov Republic.