January 3 – Franco-Prussian War – Battle of Bapaume: Prussians win a strategic victory.
January 18 – Proclamation of the German Empire: The member states of the North German Confederation and the south German states, aside from Austria, unite into a single nation state, known as the German Empire. The King of Prussia is declared the first German Emperor as Wilhelm I of Germany, in the Hall of Mirrors at the Palace of Versailles. Constitution of the German Confederation comes into effect. It abolishes all restrictions on Jewish marriage, choice of occupation, place of residence, and property ownership, but exclusion from government employment and discrimination in social relations remain in effect.
January 21 – Giuseppe Garibaldi's group of French and Italian volunteer troops, in support of the French Third Republic, win a battle against the Prussians in the Battle of Dijon.
February 8 – 1871 French legislative election elects the first legislature of the French Third Republic; monarchists (Legitimists and Orleanists) favourable to peace with the German Empire gain a large majority. The National Assembly meets in Bordeaux.
February 9 – The United States Commission on Fish and Fisheries is founded.
February 21 – The District of Columbia Organic Act of 1871 is signed into law by U.S. President Ulysses S. Grant.
February 24 – The Danish Women's Society is founded to promote women's rights in Denmark; on December 15 it adopts the style Dansk Kvindesamfund.
March 3 – The first American civil service reform legislation is signed into law by U.S. President Ulysses S. Grant, creating the United States Civil Service Commission.
March 7 – José Paranhos, Viscount of Rio Branco, becomes Prime Minister of the Empire of Brazil, serving for four years.
March 18 – Origin of the Paris Commune: Troops of the regular French Army, sent by Adolphe Thiers, Chef du pouvoir executive de la République française, to seize cannons stored on the hill of Montmartre, fraternise with civilians and the National Guard, and two army generals are killed.