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In a friendly-fire incident, a skirmish occurred between U.S.-led NATO forces and Pakistani security forces at two military checkposts along the Afghanistan–Pakistan border.

Historical image related to In a friendly-fire incident, a skirmish occurred between U.S.-led NATO forces and Pakistani security forces at two military checkposts along the Afghanistan–Pakistan border. from November 26, 2011

Friendly fire

Accidental attack on friendly forces

In military terminology, friendly fire or fratricide is an attack by belligerent or neutral forces on friendly troops while attempting to attack enemy or hostile targets. Examples include misidentifying the target as hostile, cross-fire while engaging an enemy, long range…
Source: Wikipedia (CC BY-SA)

2011 NATO attack in Pakistan

Afghanistan-Pakistan border skirmish

The 2011 NATO attack in Pakistan was a border skirmish that occurred when United States-led NATO forces engaged Pakistani security forces at two Pakistani military checkposts along the Afghanistan–Pakistan border on 26 November 2011, with both sides later claiming that the other…
Source: Wikipedia (CC BY-SA)

NATO

Intergovernmental military alliance

The North Atlantic Treaty Organization, also called the North Atlantic Alliance, is an intergovernmental military alliance between 32 member states—30 in Europe and 2 in North America. Founded in the aftermath of World War II, NATO was established with the signing of the North…
Source: Wikipedia (CC BY-SA)

Durand Line

International border between Afghanistan and Pakistan

The Durand Line, also known as the Afghanistan–Pakistan border, is a 2,640-kilometre (1,640 mi) international border between Afghanistan and Pakistan in South Asia. The western end runs to the border with Iran and the eastern end to the border with China.
Source: Wikipedia (CC BY-SA)