Durand Line :::Pakistan and Afghanistan
Hindenburg Line :::Germany and Poland.
Mac Mohan Line :::India and China
Maginot Line :::France and Germany.
Oder Neisse Line :::East Germany and Poland.
Radcliffe Line :::India and Pakistan
Siegfried Line :::Germany and France.
17th Parallel :::North and South Vietnam
24th Parallel :::India and Myanmar
38th Parallel :::North and South Korea
49th Parallel :::U.S.A. and Canada