Abraham Lincoln is the U.S. president most famously associated with the abolition of slavery. His administration oversaw the transition from the Emancipation Proclamation to the constitutional mandate provided by the 13th Amendment. By prioritizing the preservation of the Union and the eradication of the institution of slavery, Lincoln fundamentally transformed the American social and political landscape, ensuring that the practice was legally prohibited across all states following the conclusion of the Civil War.

Liu Bang, posthumously known as Emperor Gaozu, was the founder and first emperor of the Han dynasty. After the fall of the short-lived Qin dynasty, he emerged victorious in the Chu-Han Contention, establishing a stable imperial administration that would govern China for over four centuries.

Chandragupta Maurya established the Mauryan Empire in 321 B.C. after overthrowing the Nanda dynasty. This empire became the first to unify most of the Indian subcontinent under a single central administration, setting the stage for the later expansion and influence of his grandson, Ashoka the Great.

Guru Nanak Dev Ji, the founder of Sikhism, began his spiritual mission and travels around the turn of the 16th century. Historical consensus places the establishment of his teachings and the initial formation of the Sikh community in the Punjab region around 1500 AD, marking the beginning of the Sikh tradition.

The Battle of Sobraon, fought in February 1846, was the decisive final battle of the First Anglo-Sikh War. The British victory at Sobraon broke the power of the Sikh Khalsa army and led directly to the Treaty of Lahore, which granted the British control over the Punjab region.

Amir Khusro, a prolific Indo-Persian poet, musician, and scholar who served under several Delhi Sultanate rulers, is widely celebrated as 'Tuti-e-Hind' or the 'Parrot of India' due to his mastery of language and his significant contributions to both Persian and Hindustani literature and music.

The Ajanta Caves, located in Maharashtra, India, are world-renowned for their ancient rock-cut cave monuments. They contain masterpieces of Buddhist religious art, including intricate wall paintings and sculptures that depict the Jataka tales and the life of the Buddha. These caves date back to the 2nd century BC and are considered a landmark in the development of Indian art, showcasing the sophisticated techniques and spiritual devotion of the period.

The Arthashastra, written by the ancient Indian philosopher and advisor Chanakya (also known as Kautilya), is a comprehensive treatise on statecraft, economic policy, and military strategy. It provides detailed guidance on how a ruler should govern, manage the administration, and maintain the security and prosperity of their kingdom.

Lord Curzon served as the Viceroy of India from 1899 to 1905. His administration is particularly noted for the controversial partition of Bengal in 1905, which significantly impacted the political landscape of the Indian subcontinent.

The United States Congress meets at the United States Capitol, which is situated on Capitol Hill in Washington, D.C. The term 'Capital Hills' provided in the option is a common phonetic variation or misspelling of the actual location, Capitol Hill, where the legislative branch of the U.S. government conducts its official business.