International Border Lines of the World
Every boundary on the map has a history, and many of the world's borders are known by the name of the line that defines them. Some were drawn by a single official with a pencil and a ruler, some follow natural features, and some are straight lines of latitude. For candidates preparing for ADRE, APSC, Assam Police and other competitive examinations, this topic is a favourite because it is purely factual and rewards careful memorisation. This chapter introduces the line names associated with India such as the Durand Line, the McMahon Line and the Radcliffe Line, the famous defensive and historic lines of Europe, the parallels that divide countries, and the special lines of the Middle East and other regions.
Border lines of India and the subcontinent
The Durand Line is the boundary drawn in 1893 by Sir Mortimer Durand between British India and Afghanistan; today it separates Afghanistan from Pakistan. The McMahon Line was drawn in 1914 at the Simla Convention by Sir Henry McMahon and forms the boundary between India and China (Tibet); it is about 890 kilometres long and is named after its architect. The Radcliffe Line was drawn in 1947 by Sir Cyril Radcliffe and divided British India into India and Pakistan. In the disputed region of Kashmir, the Line of Control (LoC) separates India and Pakistan, while the Line of Actual Control (LAC) is the de facto boundary between India and China. These Indian borders are the most frequently asked in Assam examinations, so the names of both the lines and the officials who drew them must be remembered together.
Historic and defensive lines of Europe
Europe has many famous lines, most of them military. The Maginot Line was a strong line of fortifications built by France along its border with Germany before the Second World War. The Siegfried Line, also called the Westwall, was the matching German defensive line facing France. The Hindenburg Line was a major German defensive position in the First World War, and the Mannerheim Line was the defensive line built by Finland against the Soviet Union. After the Second World War, the Oder-Neisse Line, formed by the Oder and Neisse rivers, became the boundary between Germany and Poland. The Curzon Line was proposed in 1920 by Lord Curzon as the boundary between Poland and the Soviet Union. These lines are asked as matching questions, so each name should be tied firmly to its country.
Parallels that divide countries
Several international boundaries are straight lines of latitude, and these are among the easiest facts to remember. The 38th Parallel divides North Korea and South Korea, and the 17th Parallel once divided North Vietnam and South Vietnam. The 49th Parallel forms much of the boundary between the United States and Canada. The 24th Parallel is associated with the boundary between India and Pakistan in the Rann of Kutch region, and the 22nd Parallel forms part of the boundary between Egypt and Sudan. The Mason-Dixon Line in the United States was surveyed to settle a boundary dispute and later came to symbolise the division between the northern and southern states, especially in relation to slavery. The Sixth Parallel is simply one of the circles of latitude.
Lines of the Middle East and other regions
Several modern lines take their names from colours. The Green Line is the United Nations buffer zone that divides Cyprus. The Blue Line is the boundary drawn by the United Nations between Lebanon and Israel, and the Purple Line is the 1967 ceasefire line between Israel and Syria. The Golan Heights, a strategically important plateau, lies on the Israel-Syria border and is a well-known flashpoint in the region. The International Date Line and the Equator are not political borders but are essential reference lines of world geography: the Date Line, near 180 degrees longitude, is where the date changes by one day, and the Equator at zero degrees latitude divides the Earth into the Northern and Southern Hemispheres. Understanding the difference between a political border and a geographical reference line is important.
Quick revision
Remember the Indian lines with their authors - Durand Line (1893, Sir Mortimer Durand, Afghanistan-Pakistan), McMahon Line (1914, Sir Henry McMahon, India-China), Radcliffe Line (1947, Sir Cyril Radcliffe, India-Pakistan) - and the LoC and LAC. In Europe, the Maginot Line was French, the Siegfried and Hindenburg Lines German, the Mannerheim Line Finnish, the Oder-Neisse Line divided Germany and Poland, and the Curzon Line concerned Poland and the Soviet Union. The 38th Parallel divides the Koreas, the 17th divided Vietnam, the 49th separates the United States and Canada, and the Mason-Dixon Line symbolised the American North-South divide. The Green Line is in Cyprus, the Blue Line between Lebanon and Israel, and the Purple Line the 1967 Israel-Syria ceasefire line.
How to prepare this topic
- Group the lines by region - India, Europe, the Far East, the Middle East and the Americas - so the names do not get mixed.
- For every Indian line, learn the year and the person who drew it along with the two countries involved.
- Separate straight lines of latitude from named historical and defensive lines.
- Remember the colour-named lines as a small set: Green, Blue and Purple.
- Distinguish political borders from geographical reference lines such as the Equator and the International Date Line.
Common exam traps
- The Durand Line is between Afghanistan and Pakistan, while the Radcliffe Line is between India and Pakistan.
- The McMahon Line and the Line of Actual Control both concern India and China - do not confuse them with the LoC.
- The Maginot Line was French and the Siegfried Line German, not the other way round.
- The 38th Parallel divides the Koreas, while the 17th Parallel divided Vietnam.
- The Green Line is in Cyprus, not in Israel.
Frequently Asked Questions
What are the Durand Line, McMahon Line and Radcliffe Line?
The Durand Line is the boundary drawn in 1893 by Sir Mortimer Durand between British India and Afghanistan, and it now separates Afghanistan from Pakistan. The McMahon Line was drawn in 1914 at the Simla Convention by Sir Henry McMahon and makes up the India-China boundary. The Radcliffe Line was drawn in 1947 by Sir Cyril Radcliffe and divided British India into India and Pakistan.
What is the difference between the Line of Control and the Line of Actual Control?
The Line of Control, or LoC, separates India and Pakistan in the disputed region of Kashmir and was formalised after the 1972 Simla Agreement. The Line of Actual Control, or LAC, is the de facto boundary between India and China. Both are important for India, but they involve different neighbours and different disputes, so they must not be confused with each other.
What were the Maginot, Siegfried, Hindenburg and Mannerheim lines?
The Maginot Line was a strong line of French fortifications built along the border with Germany before the Second World War. The Siegfried Line, or Westwall, was the matching German defensive line facing France, and the Hindenburg Line was a major German defensive position in the First World War. The Mannerheim Line was the defensive line built by Finland against the Soviet Union.
Which parallels divide which countries?
The 38th Parallel divides North Korea and South Korea, and the 17th Parallel once divided North Vietnam and South Vietnam. The 49th Parallel forms much of the boundary between the United States and Canada, and the 24th Parallel is associated with the India-Pakistan boundary in the Rann of Kutch. The 22nd Parallel forms part of the Egypt-Sudan boundary, and the Mason-Dixon Line came to symbolise the American North-South divide.
What are the Green Line, Blue Line and Purple Line?
The Green Line is the United Nations buffer zone that divides Cyprus. The Blue Line is the boundary drawn by the United Nations between Lebanon and Israel, and the Purple Line is the 1967 ceasefire line between Israel and Syria. The Golan Heights, a strategically important plateau on the Israel-Syria border, is a well-known flashpoint in the region.