International Boundary Lines:

### Table of International Boundary Lines:

| **Name of Line/Boundary**   | **Between**                     | **Features/Description**                                                                 |

| 17th Parallel               | South Vietnam and North Vietnam | Divided North and South Vietnam per the 1954 Geneva Accords; irrelevant after unification. |

| 20th Parallel               | Libya and Sudan                 | Marks the border between Sudan and Libya.                                                |

| 22nd Parallel               | Egypt and Sudan                 | Defines a major portion of the Sudan-Egypt border along the 22nd latitude north.        |

| 25th Parallel               | Mauritania and Mali             | Marks the northernmost section of the Mali-Mauritania border.                           |

| 31st Parallel               | Iran and Iraq                   | Border between Iraq and Iran; also marks the US states of Louisiana and Mississippi.    |

| 38th Parallel               | South Korea and North Korea     | Central part of the Demilitarized Zone (DMZ) between North and South Korea.             |

| 49th Parallel               | USA and Canada                  | International border between the northern USA (excluding Alaska) and Canada.            |

| Durand Line                 | Pakistan and Afghanistan        | Set by Sir Mortimer Durand in 1893; not recognized by modern Afghanistan.              |

| Hindenburg Line             | Poland and Germany              | Defensive line in French territory during WWI; obsolete after the 1919 Treaty of Versailles. |

| McMahon Line                | China and India                 | De facto border between India and China; China disputes its legal status.               |

| Maginot Line                | Germany and France              | French defensive line pre-WWII; became obsolete after the German invasion.             |

| Mannerheim Line             | Russia and Finland              | Finnish defensive line against the Soviet Union during WWII.                            |

| Oder-Neisse Line            | Poland and Germany              | Polish-German border per the Potsdam Conference; recognized by Germany in 1990.         |

| Radcliffe Line              | India and Pakistan              | Drawn for the 1947 Partition of India, forming India, Pakistan, and Bangladesh borders.  |

| Siegfried Line              | France and Germany              | Extension of the Hindenburg Line; a WWI defensive line on the western front.            |

| Blue Line                   | Lebanon and Israel              | UN-established border demarcation between Lebanon and Israel.                           |

| Green Line / UN Buffer Zone | Republic of Cyprus and Turkish Cyprus | UN-patrolled demilitarized zone in Cyprus, established after the 1974 ceasefire.        |

This table captures the key details in a concise format. If you'd like further details on any specific boundary line, let me know!