Afghanistan and Iran from continuity to discontinuity

Land which has called Afghanistan, had common history with Iran For various reasons such as climate, geographic, culture and religious. The northern and western parts of this country had comprehensive alliance with Iran until the fall of Nader Shah Afshar, but after his death and his territory Analyze was steps into the way of discontinuity from Iran. However, Ahmad Shah Durrani, the founder of the independent Afghan government did not set themselves apart from Iran, but Statistics developments in the region, especially the British colonial policy provided the complete rupture areas to the governments of eastern regions of Khorasan. Revision of this rupture from power of the hierarchy of the job Barack and Sdvzayy to the Treaty of Paris and the separation of Herat is the subject of the present article, which codify with using historical research and cite to some of Iranians and Afghanis resources.