Observers say the rivalry between the two women is largely due to unsettled issues over Bangladesh's war of independence and the assassinations that followed.

NPR: Upheaval Marks Another Election in Bangladesh

If you add the Palestinian revolt of 1936-39 and the war between Palestinian villagers and Jewish settlers (1947-48) to Israel's War of Independence (1948-49), the Suez War (1956), the Six Day War (1967), the Yom Kippur-Ramadan War (1973), the Lebanon War (1982) and the Palestinian intifadah (1987-93, approximately), the world has seen one major Arab-Israeli war roughly every eight years.

CENTERFORSECURITYPOLICY: It's War -- and the U.S. Better Ensure Israel Wins It