The Prussian education system refers to the system of education established in Prussia as a result of educational reforms in the late 18th and early 19th century, which has had widespread influence since.
 It is predominantly used as an American political slogan in educational reform debates, since it was adopted by all American K–12 public schools and major universities as early as the late 18th century, and is often used as a derogatory term for education in the service of nation-building, teaching children and young adults blind obedience to authority, and reinforcing class and race prejudice.
 The actual Prussian education system was introduced as a basic concept in the late 18th century and was significantly enhanced after Prussia's defeat in the early stages of the Napoleonic Wars.
 The Prussian educational reforms inspired other countries and remains important as a biopower in the Foucaultian sense for nation-building.
 Compulsory education on the Prussian example was soon mirrored in Scandinavia, and United States started to adopt the Prussian example.
 Early American adopters include Daniel Coit Gilman, who set up The General Education Board, later renamed The Rockefeller Foundation, and first president of Johns Hopkins, John Dewey at the University of Chicago, James McKeen Cattell at The University of Pennsylvania and Columbia University, Henry Philip Tappan at The University of Michigan, James Earl Russell at the New York College for the Training of Teachers, and many more.
 France and the UK failed to introduce similar systems until the 1880s.
Bhuma Singh Dhillon (died 1746) was a royal Sikh warrior of the 18th century in Punjab and the second leader of the Bhangi Misl succeeding Sardar Chhajja Singh.
Maharaja Jhanda Singh Dhillon (died 1774) was a famous royal Sikh warrior of the late 18th century.
 Moreover, he was Maharaja of Amritsar, Lahore, Multan, Chiniot, Jhang, Bhera, Rawalpindi, Hasan Abdal, Sialkot and Gujrat.
 Under Jhanda Singh's leadership and statesmanship he increased the army's strength by 40% from 12000 to 20000 regular horsemen and accompanied by a huge increase in territory.
 Under his leadership the Dhillon family became the dominant de facto ruling power of Punjab.
 His father was the legendary Hari Singh Dhillon, one of the most powerful, admired and famous of all the Sikh warriors of the time.
 He also had a famous warrior brother Ganda Singh Dhillon.
 Jhanda Singh appointed his younger brother Ganda Singh as the commander in chief of the forces.
 Jassa Singh Ramgarhia was one of the closest friends of Jhanda Singh.
The Sukerchakia Misl was one of 12 Sikh Misls in Punjab during the 18th century concentrated in Gujranwala and Hafizabad district in Western Punjab and ruled from (1752-1801).
 The Sukerchakia last Misldar (commander of the Misl) was Maharaja Ranjit Singh.
 Towards the end of the eighteenth century, Maharaja Ranjit Singh united all the misls and established an independent kingdom in Punjab.
Lahore ( ) (Punjabi: ; Urdu: ‎ ) is the capital city of the Pakistani province of Punjab.
 It is the second-most populous city in Pakistan after Karachi.
 The city is located in the north-eastern end of Pakistan's Punjab province, near the border with the Indian state of Punjab.
 Lahore is ranked as a beta-world city, and is one of Pakistan's wealthiest cities with an estimated GDP of $58.14 billion (PPP) as of 2014.
Maharaja Ganda Singh Dhillon (died 1776) was a famous royal Sikh warrior of the late 18th century.
 Moreover, he was Maharaja of Amritsar, Lahore, Multan, Chiniot, Jhang, Bhera, Rawalpindi, Hasan Abdal, Sialkot and Gujrat, Pakistan.
 His father was Hari Singh Dhillon, an admired Sikh warrior.
 He also had a famous warrior brother Jhanda Singh Dhillon.
 He was appointed commander in chief of the forces by his older brother Jhanda Singh and after his death he became leader and Maharaja of the principality.
Maharaja Hari Singh Dhillon (died 1764), was a Dhillon Jat and a renowned royal Sikh warriors of the 18th century, who succeeded the Bhangi Misl from Bhuma Singh Dhillon.
Italian Neoclassical and 19th-century art refers to painting and the plastic arts made in Italy or by Italian artists in the Neoclassical period (late 18th – c. mid-19th centuries) and the 19th century.
 In the late 18th and 19th centuries, Italy went through a great deal of political, social, economic and cultural changes and reforms, including several foreign invasions, most notably by Napoleon Bonaparte and the Austrians, several revolutions in 1848 and the turbulent Risorgimento, which resulted in the Italian unification and the Kingdom of Italy.
 Thus, Italian art in the late 18th and throughout the 19th century went through a series of minor and major changes in style.
Sardar Chhajja Singh, was a Sikh warrior and leader of Jathâ succeeding Banda Singh Bahadur of the early 18th century Punjab region.
 He was also the founder of the Bhangi Misl He was a Jatt of Panjwar village of Tarn Taran District in Majha region of Punjab, approximately 24 km from Amritsar.
 He was the first companion of Banda Singh Bahadur to receive Sikh baptism of Amrit.
 According to Kanaihya Lal, he had taken Amrit at the hands of Guru Gobind Singh.
Nanua Bairagi, (~17th–18th century) also known as Nanua Bhagat and Jamala Singh, was a renowned mystic, humanitarian and Sikh warrior of Punjab.
 He belonged to Saini community of Punjab.

Question: This famous royal Sikh warrior of the late 18th century was Maharaja of the second-most populous city in Pakistan after what city?
Answer: Karachi