Add to this the established, southern-backed insurgencies in South Kordofan and Blue Nile state to the west, and a new alliance between Darfuri rebels of the Justice and Equality movement and the SPLM-North, and a picture emerges of the entire north-south frontier either in flames, or tinderbox-dry and primed to ignite.
A South Korean government source, cited by Yonhap, said a border patrol had found the man, in his early 30s, lying exhausted on the southern bank of the Han river where it forms part of the western section of the North-South frontier.
Turkish security sources said warplanes and artillery had hit Kurdish YPG militia sites south of frontier town of Jarablus and towards Manbij, a city captured by Kurdish-aligned SDF this month in a U.S.-backed operation.
According to Border Patrol figures, 3,048 family members and 3,113 unaccompanied children were caught at the south-west frontier in February – fewer than half the number who were apprehended in December.
Wiśniowiecki also fought against the Tatars in 1640 46, whose raids on the south-east frontier of the Commonwealth endangered his holdings.
Tripoli fell to the Eighth Army on 23 January 1943, and six days later Allied forces reached Tunisia's south-eastern frontier, where Italian and German forces manned the Mareth Line, a series of fortifications built by the French in the 1930s.
The state's inability to control the activities of the magnates and the Cossacks had contributed to the semi-permanent instability and danger at the Commonwealth's south-eastern frontiers.
Only a short distance to the south lies the frontier with Myanmar.
In 1829, in the Treaty of Adrianople, Russia pushed the frontier south to include the Danube delta.
It is just driving Al Qaeda south into the frontier provinces of Pakistan.
Texas represents the confluence of the two most violent areas in the country: the South and the frontier.
