Boundaries are man-made separation lines between nation states - a demarcation line
The Turkey/Syria border was decided by railway lines
Many national borders have arisen due to natural boundaries such as rivers, mountain ranges etc.
Parts of the Mexico/US border is the Rio Grande River
The Andes range between Chile and Argentina
However, all nation boundaries were created in the past; either years, decades or centuries ago
The Spanish/French border was established in 1659
Mexico–US border in 1853–1854
Borders are developed through specific historical developments during a nation state's lifetime, providing they have the ability and power at the time (war, religion, marriage etc.)
Belgium was created in 1830–1831 as a buffer state between Catholic France and the Protestant Netherland
Some borders are cultural, which mark a divide between ethnic groups or cultural identity - the Slovakia and Czech Republic border is partly cultural
Other borders are a result of colonial history, and many do not take into account different ethnic or religious groups, which has led to issues of sovereignty and legitimacy
It is hard to find any national border that a European country, at some stage of its historical development, hasn't been involved in:
The partition of Africa by European nations in the 18th and 19th centuries does not relate to indigenous cultural and ethnic distribution
Space/land was divided by competing powers to distribute raw materials and water resources between themselves
The Egyptian and Sudanese border was drawn as a straight line by Great Britain in 1899
Long established ethnic regions were divided into two or more different state territories
Borders can be created to resolve political tensions:
The Korean Demilitarized Zone (DMZ) acts as a border barrier and is a strip of land (250 km (160 mi) long and 4 km (2.5 mi) wide
It runs across the Korean Peninsula near the 38th parallel north and roughly divides the peninsula in half
The DMZ was established as a buffer zone between North and South Korea during the Korean Armistice Agreement in 1953
Rwanda sovereignty problems:
Belgians took over after WWII, and favoured the Tutsi people
Led to the rebellion of the Hutus against the Tutsi and Belgian
-> Mass killing of these between the 60s and 70s
1994, president of Rwanda and Burundi were both Killed, leading to mass genocide 800,000 Tutsi and moderate Hutus
In 1994, the Hutu government fled to Zaire with 2million Hutu refugees and an interim government of national unity was created