Durand Line is the line demarcating the boundaries of India and Afghanistan. It was drawn up in 1896 by Sir Mortimer Durand.
Hindenburg Line is the boundary dividing Germany and Poland. The Germans retreated 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 built by France along its border with Germany before World War II, to protect its boundary from German attack.
Mannerheim Line is the line of fortification on the Russia-Finland border. Drawn up by General Mannerheim.
MacMahon Line was drawn up by Sir. Henry MacMahon, demarcating the frontier of India and China. China did not recognize the MacMahon line and crossed it in 1962.
Medicine Line is the border between Canada and the United States.
Order-Neisse Line is the border between Poland and Germany, running along the Order and Neisse rivers, adopted at the Poland Conference (Aug 1945) after 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.
17th Parallel defined the boundary between North Vietnam and South Vietnam before the two were united.
