Why did ethnic tension become such a severe problem in the soviet union and yugoslavia?

What lands were added to the russian empire under ivan iv, peter the great, and catherine the great?

The bloodless, or glorious, revolution in 1688 a. encouraged nobles in their quest to recreate a feudal society. b. ended the commonwealth and restored james ii to the throne. c. placed mary and william, both protestants, on the throne. d. restored property rights to those who had lost them as a consequence of the english civil war.

What did palestinian leader mahmoud abbas promise after succeeding yasir arafat in 2004?