Important international Boundary Lines:
Important international boundaries are important in the UPSC examination and fall under the Gk categories. Knowing the location of international borders is very important in answering map-based questions in Geography. The Syllabus of Political Science and International Relations also covers some of the issues affecting border crossings and international trade.
Durand Line : It is the line demarcating the boundaries of India and Afghanistan.
It was drawn up in 1893 by Sir Mortimer Durand, India recognises Durand Line but Afghanistan does not.
Hindenburg Line: It is the boundary dividing Germany and Poland. The Germans marched to this line in 1917 during World War I.
Mason-Dixon Line is a line of demarcation between four states in the United States.
Marginal Line was the 320 km line of fortification on the Russia- Finland border, drawn up by General Mannerheim.
McMahon Line was drawn up by Sir Henry McMahon, demarcating the frontier of India and China. China doesnot recognise the McMahon line and crossed it in 1962.
Medicine Line is the border between Canada and the United States.
Order-Neisse Line: It is the border between Poland and Germany running along the Oder and Neisse rivers, adopted after the Poland Conference (August 1945.,after the World War II.
Radcliffe Line was drawn up by Sir Cyril Radcliffe, demarcating the
boundary between India and Pakistan.
Siegfried Line is the line of fortification drawn up by Germany on its border with France.
17h Parallel defined the boundary between North Vietnam and South Vietnam before the two were united.
24th Parallel is the line which Pakistan claims for demarcation between India and Pakistan. This, however, is not recognised by India.
26th Parallel south is a circle of latitude which crosses through Africa, Australia and South America,
30th Parallel north is a line of latitude that stands one-third of the way between the equator and the North Pole.
33rd Parallel north is a circle of latitude which cuts through the southern United States, parts of North Africa, parts of the Middle East, and
35th Parallel north forms the boundary between the state of North
Carolina and the state of Georgia and the boundary between the state of Tennessee and the state of Georgia, the state of Alabama, and the state of Mississippi.
36 Parallel forms the southernmost boundary of the state of Missouri with the state of Arkansas.
36°30′ Parallel north forms the boundary between the Tennessee and the Commonwealth of Kentucky, between the Tennessee river and the Mississippi river, the boundary between Missouri and Arkansas west of the White River, and the northernmost boundary between the Texas and the Oklahoma.
37th Parallel north formed the southern boundary of the historic and extra-legal territory of Jefferson.
38th Parallel is the parallel of latitude which separates North Korea and South Korea.
39h Parallel north is an imaginary circle of latitude that is 39 degrees north of Earth’s equatorial plane.
40th Parallel north formed the original northern boundary of the British Colony of Maryland
41st Parallel north forms the northern boundary of the state of Colorado with Nebraska and Wyoming and the southern boundary of the state of Wyoming with Colorado and Utah.
42nd Parallel north forms most of the New York-Pennsylvania border.
43rdParallel north forms most of the boundary between the state of Nebraska and the state of South Dakota and also formed the northern
border of the historic and extra-legal territory of Jefferson.
The Parallel 44° north is an imaginary circle of latitude that is 44 degrees north of the Earth’s equatorial plane.
45th Parallel north is often the halfway point between the Equator and the North Pole. The 45th parallel makes up most of the boundary between Montana and Wyoming.
49th Parallel is the boundary between the USA and Canada.
Zambezi River :Its boundary proceeds eastwards in a straightline to a point on the international boundary between Zambia and Zimbabwe.