The 19th century began on 1 January 1801 (represented by the Roman numerals MDCCCI), and ended on 31 December 1900 (MCM). The 19th century was characterized by vast social upheaval. Slavery was abolished in much of Europe and the Americas. The First Industrial Revolution, though it began in the late 18th century, expanding beyond its British homeland for the first time during this century, particularly remaking the economies and societies of the Low Countries, the Rhineland, Northern Italy, and the Northeastern United States. A few decades later, the Second Industrial Revolution led to ever more massive urbanization and much higher levels of productivity, profit, and prosperity, a pattern that continued into the 20th century. It was, in the Middle East, an era of change and reform. The Islamic gunpowder empires fell into decline and European imperialism brought much of South Asia, Southeast Asia, and almost all of Africa under colonial rule. Reformers were opposed at every turn by conservatives who strove to maintain the centuries old Islamic laws and social order. The century also saw the collapse of the large Spanish and Mughal Empires. This paved the way for the growing influence of the British, French, German, Russian, Austro-Hungarian, Italian, and Japanese Empires along with the United States. The British boasted unchallenged global dominance after 1815. After the defeat of France in the Napoleonic Wars, the British and Russian Empires expanded greatly, becoming two of the world's leading powers. Russia expanded its territory to Central Asia and the Caucasus. The Ottoman Empire underwent a period of Westernization and reform known as the Tanzimat, vastly increasing its control over core territories in the Middle East. However, it remained in decline and became known as the sick man of Europe, losing territory in the Balkans and North Africa. The remaining powers in the Indian subcontinent such as the Maratha and Sikh Empires suffered a massive decline and their dissatisfaction with the British East India Company's rule led to the Indian Rebellion of 1857, marking its dissolution.