Countries and their Official books
France – Yellow book
Netherland – Orange book
Italy/Iran – Green book
German/Portugal/China- White book
Japan/Belgium – Grey Book
Britain/India – Blue Book
Name of Hotline between countries
Hotlines Countries
17th parallel North vietnam and south vietnam
38th parallel North korea-South korea
Durand line India-Afganistan/Pakistan-Afganistan
Machmohan line India-China/ India-Tibbet
24th parallel India-Pakistan
Maginot line /seigfried line France-German German-France
49th parallel America- Canada
Plimsoll line This is the line marked on the hull of a ship to avoid overloading.
16th parallel Namibia-Angola
Hindenberg line / Odderneisse line German-Poland East german-Poland
Sir coricrick line India-Pakistan
Radcliff line India-Pakistan
Mannerhein line Russia-Finland