Revolutionary wave in the context of "Revolutions of 1848"

The revolutions of 1917–1923 were a revolutionary wave that included political unrest and armed revolts around the world inspired by the success of the Russian Revolution and the disorder created by the aftermath of World War I. The uprisings were mainly socialist or anti-colonial in nature. Most socialist revolts failed to create lasting socialist states. The revolutions had lasting effects in shaping the future European political landscape, with, for example, the collapse of the German Empire and the dissolution of Austria-Hungary.

World War I mobilized millions of troops, reshaped political powers and drove social turmoil. From the turmoil outright revolutions broke out, massive strikes occurred, and many soldiers mutinied. In Russia, the Tsar Nicholas II abdicated during the February Revolution. The short-lived liberal Russian Provisional Government was formed, but it was overthrown by the Bolsheviks in the October Revolution, which triggered the bloody Russian Civil War. Many French soldiers mutinied in 1917 and refused to engage the enemy. In Bulgaria, many troops mutinied, and the Bulgarian Tsar stepped down. Mass strikes and mutinies occurred in Austria-Hungary, and the Habsburg monarchy collapsed. In Germany, the November Revolution led to the end of the German Empire. Italy faced various mass strikes. Turkey experienced a successful war of independence. Ireland was partitioned and the Irish Free State was created. Across the world, various other protests and revolts occurred.

The decolonization of the Americas occurred over several centuries as most of the countries in the Americas gained their independence from European rule. The American Revolution was the first in the Americas, and the British defeat in the American Revolutionary War (1775–83) was a victory against a great power, aided by France and Spain, Britain's enemies. The French Revolution in Europe followed, and collectively these events had profound effects on the Spanish, Portuguese, and French colonies in the Americas. A revolutionary wave followed, resulting in the creation of several independent countries in Latin America. The Haitian Revolution (1791–1804), perhaps one of the most successful slave uprisings in history, resulted in the independence of the French slave colony of Saint-Domingue (now Haiti). The Peninsular War with France, which resulted from the Napoleonic occupation of Spain, caused Spanish Creoles in Spanish America to question their allegiance to Spain, stoking independence movements that culminated in various Spanish American wars of independence (1808–33), which were primarily fought between opposing groups of colonists and only secondarily against Spanish forces. At the same time, the Portuguese monarchy fled to Brazil during the French invasion of Portugal. After the royal court returned to Lisbon, the prince regent, Pedro, remained in Brazil and in 1822 successfully declared himself emperor of a newly independent Brazilian Empire.

Spain would lose all three of its remaining Caribbean colonies by the end of the 1800s. Santo Domingo declared its first independence from Spain in 1821. The independent state was renamed Republic of Spanish Haiti. Haiti conquered the region shortly afterwards in 1822. Two decades later, in 1844, independence was proclaimed for the second time, and the Dominican Republic was established. This triggered the Dominican War of Independence (1844–56). In 1861, however, Spain regained control of the territory, and the colony was reestablished. The Dominican Restoration War (1863–65), the second war of liberation, led to the second independence from Spain, and the Dominican Republic's third and final independence. Cuba fought for independence from Spain in the Ten Years' War (1868–78) and Little War (1879–80) and finally the Cuban War of Independence (1895–98). American intervention in 1898 became the Spanish–American War and resulted in the United States gaining Puerto Rico, Guam (which are still U.S. territories), and the Philippine Islands in the Pacific Ocean. Under military occupation, Cuba became a U.S. protectorate until its independence in 1902.

The revolutions of 1848, also known as the springtime of the peoples, were a series of revolutions throughout Europe that spanned almost two years, between 1848 and 1849. They remain the most widespread revolutionary wave in European history to date.

The revolutions varied widely in their aims but generally opposed conservative systems, such as absolute monarchy and feudalism, and sought to establish nation states, founded on constitutionalism and popular sovereignty. The revolutionary wave began with the revolution in Sicily in January and spread across Europe after the revolution in France in February 1848. Over fifty countries were affected, but with no significant coordination or cooperation among their respective revolutionaries. Some of the major political contributing factors were widespread dissatisfaction with political leadership, demands for more participation in government and democracy, for freedom of the press, and by the working class for economic rights, and the rise of nationalism. Other economic factors, such as the European potato failure, triggered mass starvation, migration, and civil unrest.