Ludhiana district is one of the 23 districts in the Indian state of Punjab. It is Punjab's largest district by both area and population. Ludhiana, the largest city in Punjab, is the district headquarters. The main industries are bicycle parts and hosiery. Ludhiana is a hub of ladies footwear manufacturing small scale units around 10000 units. Ludhiana is the largest city in the state. The district is made up of seven tehsils, seven sub-tehsils and twelve development blocks. Ludhiana district has the highest HDI in Punjab at 0.761 (2004 UNDP). History Ludhiana gets its name from the Lodhi Dynasty, which is believed to have founded the city in 1480. During the reign of the Mughal emperor Akbar the area formed part of the Sarkar of Sirhind. Chakar, Talwandi Rai in 1478 AD, Raikot in 1648 AD and Jagraon in 1688 AD were founded by the Raj family of Raikot. In the latter period of Mughal rule the western part of the district was leased to the Rais of Raikot. By the early eighteenth century, they had become semi-independent of the Mughals. The villages in Ludhiana district remained independent and under the rule of local powerful village Sikh chieftains, from 1707 to 1835. In 1747 Ahmad Shah Durrani invaded and battled the imperial army near Khanna. Although the Mughals were able to stop Ahmad Shah, his subsequent invasions weakened the Mughals, which allowed the Rais to take control of Ludhiana town in 1760. During the reign of Maharaja Ranjit Singh, Ludhiana became an important British cantonment. Initially, in 1805, Ranjit Singh occupied Ludhiana. However, in 1809, the British decided to curb his advance eastward and sent troops to confront him. Ranjit Singh was forced to sign the treaty of 'perpetual friendship' with the British, which confined his activities to the right bank of the Sutlej. British troops were permanently stationed in Ludhiana and the Cis-Sutlej states came under British protection. According to the 1901 census, Hindus numbered 269,076, or 40% of the total; Muslims, 235,937, or 35%; and Sikhs, 164,919, or 24%. In 1947 due to violence and strife between the communities, most of the Muslim population left for Pakistan. Geography Ludhiana is a centrally located city of Punjab, which is on the Grand Trunk Road from Delhi to Amritsar at latitude 30.55 North and longitude 75.54 East in Northern India. Ludhiana is the most centrally located district in the Malwa