African slaves often used Christian hymns to communicate. The slaves used these hymns in order to communicate coded messages to each other about their conditions, and possible avenues for escape. The slaves' overseers thought that the slaves were simply singing religious songs and were not able to recognize the messages hidden within these songs. These hymns had an influence on the later musical style of the African American spiritual.
You can talk about the boarder crisis along the Estonian boarder and Russian boarder. The is called a crisis because there is a tradition steeped kingdom called the Seto caught directly in the middle of it(their kingdom is split half and half).
