The transition of power was to occur between a dominant state and a great power (in most cases), leading to a war.

Azerbaijan is considered a one party dominant state.

Ed's dominant emotional state is a kind of baffled depression.

Some countries have many political parties that exist, but only one that can by law be in control, which is called a one-party dominant state.

Texas, by far the dominant state in the region, also has reason to be optimistic.

Prussia was the dominant state in this new grouping, with four-fifths of its territory and population.

"Colorado has moved from a battleground state to an almost dominant Republican state."

In simpler terms the vassal state would have to provide military power to the dominant state.

It was the dominant state in Arabia until 525 AD.

Angola has at this stage (2012) to be classified as a one party dominant state.