Money can become another bone of contention in this pairing.
Throughout the 17th century Riga was a bone of contention between Sweden, Poland and Russia.
From early in the 18th century it was a bone of contention between the Ottoman Turks and the Russians, the latter capturing it five times between 1711 and 1812.
The attrition of the Quartermaine clan in Port Charles is a bone of contention with many fans.
Silesia, now split up into seventeen principalities, was the bone of contention between them; and when Casimir suddenly invaded that country, took Wschowa, and made Prince Charles of Bohemia a prisoner, war between the two kingdoms actually broke out and Casimir was besieged in Cracow by the Czechs.