Important Lines and Boundaries
- Marginal Line : 320 km line of fortification on the Russia-Finland border
- Line of Actual Control : India & China on the Northern Border
- Line of Control : India and Pakistan
- Durand Line : Afghanistan and Pakistan
- Radcliffe Line : India and Pakistan (its includes Bangladesh Line)
- Blue Line : Isreal & Lebanon
- Purple Line : Israel and Syria
- Green Line : Israel and its neighbours (Egypt, Jordan, Lebanon and Syria)
- Mason–Dixon line : Maryland and Pennsylvania/Delaware in Colonial America
- Curzon Line : Poland & Russia
- Military Demarcation Line (MDL) or Armistice Line : North Korea and South Korea
- McMohan Line : India & China
- Maginot Line : France & Germany
- Mannar haime line : Russia & Finland
- Order Neisse Line : Germany & Poland (aftermath of World War II)
- Hindenburg Line : Poland & Germany (at the time of First World War)
- Sigfried Line East : France & Germany (at the time of second world war)
- 16 Parallel North : Angola and Namibia
- 17th Parallel Line : North & South Vietnam
- 20 Parallel North : Libya & Sudan
- 22 Parallel North : Egypt & Sudan
- 25 Parallel North : Mauritania & Mali
- 26 Parallel North : Western Sahara & Mauritania
- 31 Parallel North : Iraq & Iran
- 35 Parallel North : US it serves as border b/w Tennessee/Mississippi, Tennnessee/Alabama, Tennesse/Georgia, North Carolina/Georgia
- 36 Parallel North : In the US it Forms forms the southernmost boundary of the state of Missouri with the state of Arkansas
- 38 Parallel North Line : North & South Korea
- 40 Parallel North : US it serves as border b/w Nebraska & Kansas
- 41 Parallel North : US it forms the border b/w wyoming/utah border, Wyoming/colorado, Nebraska/Colorado.
- 42 Parallel North : US it serves as border of new york & Pennsylvania Border
- 43 Parallel North : US it serves as border of b/w State Nebraska & state of south Dakota
- 45 Parallel North : US it forms the boundary b/w Montana & wyoming
- 49 Parallel North (Medicine Line) : USA & Canada
