What is the Khyber Pass plaque?

This was found while searching on A9.com. I uses Khyber Pass Plaque in the search field. "...we found the marble-canopied monument commemorating those British soldiers from the Queens Own Corps of Guides who died in Kabul in 1879. The plaque said that they had "conferred undying honor not only to the regiment to which they belong but on the whole British army." It wasn't the army that tamed the country around Mardan, but the Benton Canal, completed in 1902 and bringing a part of the Swat River under the Malakand Pass and out around Mardan, whose outskirts were green with orchards and yellow with wheat stretching from tree to tree... http://www.khyber.org/places/2005/NorthernPakistanCharacterBeaut.shtml