Towr Kham Fire Base is an American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 firebase in Nangarhar, Afghanistan

Afghanistan

Afghanistan , officially the Islamic Republic of Afghanistan, is a landlocked country located in the centre of Asia, forming South Asia, Central Asia and the Middle East. With a population of about 29 million, it has an area of , making it the 42nd most populous and 41st largest nation in the world...

.
The firebase is manned by a platoon-sized force. It is a few minutes from the Towr Kham checkpoint on the Pakistan

Pakistan

Pakistan , officially the Islamic Republic of Pakistan is a sovereign state in South Asia. It has a coastline along the Arabian Sea and the Gulf of Oman in the south and is bordered by Afghanistan and Iran in the west, India in the east and China in the far northeast. In the north, Tajikistan...

 border.

The firebase was staffed by a platoon of military police

Military police

Military police are police organisations connected with, or part of, the military of a state. The word can have different meanings in different countries, and may refer to:...

 in March 2006, one month prior to Afghan Border Police

Afghan Border Police

The Afghan Border Police secure Afghanistan's border and international airports. The ABP is also responsible to administer the country's immigration process and administer customs regulations. The ABP's anti-narcotic efforts are a prominent concern to the international community at present...

upgrading the checkpoint to one where identity documents were required of those crossing the border.
Part of the Platoon's assignment was to provide police training to their Afghan colleagues.