Kabulistan is a historical term referring to the eastern territories of Greater Khorasan

Greater Khorasan

Greater Khorasan or Ancient Khorasan is a historical region of Greater Iran mentioned in sources from Sassanid and Islamic eras which "frequently" had a denotation wider than current three provinces of Khorasan in Iran...

 that is centered around present-day Kabul

Kabul

Kabul , spelt Caubul in some classic literatures, is the capital and largest city of Afghanistan. It is also the capital of the Kabul Province, located in the eastern section of Afghanistan...

, 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...

. It is sometimes mentioned as Caboul in many old English and French books.

At its peak, Kabulistan included Peshawar

Peshawar

Peshawar is the capital of Khyber-Pakhtunkhwa and the administrative center and central economic hub for the Federally Administered Tribal Areas of Pakistan....

, Kunduz, Badakhshan

Badakhshan Province

Badakhshan is one of the 34 provinces of Afghanistan, consisting of 28 districts. It is located in the north-east of the country, between the Hindu Kush and the Amu Darya. It is part of the Badakhshan region.-Geography:...

, Ghazni

Ghazni Province

Ghazni is one of the thirty-four provinces of Afghanistan. Babur records in his Babur-Nama that Ghazni is also known as Zabulistan It is in the east of the country. Its capital is Ghazni City...

, Qandahar

Kandahar Province

Kandahar or Qandahar is one of the largest of the thirty-four provinces of Afghanistan. It is located in southern Afghanistan, between Helmand, Oruzgan and Zabul provinces. Its capital is the city of Kandahar, which is located on the Arghandab River. The province has a population of nearly...

, and the territory to the east, as far as the Indus River

Indus River

The Indus River is a major river which flows through Pakistan. It also has courses through China and India.Originating in the Tibetan plateau of western China in the vicinity of Lake Mansarovar in Tibet Autonomous Region, the river runs a course through the Ladakh district of Jammu and Kashmir and...

 in 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...

.

In some of the European books that were written during the 18th to the 20th centuries, most of today's Afghanistan was known as Caboul and its kingdom was called the Kingdom of Caboul. The name "Afghanistan" was attributed to the land south of Kabulistan (Northwestern 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...

, referred to as Pashtunistan

Pashtunistan

Pakhtunistan or Pashtunistan, meaning the "land of Pakhtuns" or "land of Pashtuns", is a modern term used for the historical region inhabited by the native Afghans or Pashtun since at least the 1st millennium BC...

 and including parts of Balochistan

Balochistan (Pakistan)

Balochistan is one of the four provinces or federating units of Pakistan. With an area of 134,051 mi2 or , it is the largest province of Pakistan, constituting approximately 44% of the total land mass of Pakistan. According to the 1998 population census, Balochistan had a population of...

).

In some periods Kabulistan had its own independent kingdoms. Kabul Shahis ruled the region between 565 and 879 BCE with Kabul and Kapisa as their capitals. In the 9th century CE

Common Era

Common Era ,abbreviated as CE, is an alternative designation for the calendar era originally introduced by Dionysius Exiguus in the 6th century, traditionally identified with Anno Domini .Dates before the year 1 CE are indicated by the usage of BCE, short for Before the Common Era Common Era...

, they were thrown out of Kabul by Ya'qub-i Laith Saffari, the founder of the Saffarid dynasty

Saffarid dynasty

The Saffarids or the Saffarid dynasty was a Persian empire which ruled in Sistan , a historical region in southeastern Iran, southwestern Afghanistan and northwestern Pakistan...

. Kabul Shahis had built a defensive wall all around the Kabul city to protect it against the army of Muslim Saffarids. The remaining of these walls are still visible over the mountains which are located inside the Kabul city.