Milestones
| Year | Battle | Country | Significance |
|---|---|---|---|
| 1854–1855 | Siege of Sevastopol | United Kingdom | First use of the telegraph in combat. |
| 1859 | Austro-Sardinian War | France | First major use of railroads at the strategic level. |
| 1861 | First Battle of Bull Run | CSA | First battle in which railroads play a decisive role. |
| 1862 | Battle of Hampton Roads | CSA USA | First fight between two powered iron-covered warships. |
| 1863 | Battle of Gettysburg | CSA USA | Largest battle ever fought in the Western Hemisphere. |
| 1864–1865 | Siege of Petersburg | CSA USA | First example of modern trench warfare. |
| 1866 | Battle of Tuyutí | Argentina Empire of Brazil Uruguay Paraguay |
Largest battle ever fought in South America. |
| 1898 | Spanish American War | Spain USA | Extensive use of steel battleships in naval conflict. |
| 1905 | Battle of Tsushima | Russia Japan | Decisive battle between steel-covered warships. |
| 1911–1912 | Italo-Turkish War | Italy | First use of airplanes in combat. |
| 1914 | First Battle of the Marne | France | First large-scale use of motorised infantry. |
| 1914–1918 | First Battle of the Atlantic | Germany | First major campaign of submarine warfare. |
| 1915 | Second Battle of Ypres | Germany | First large-scale use of chemical weapons in battle. |
| 1916 | Battle of Verdun | France Germany | High point of fixed fortification warfare. |
| 1917 | Battle of Cambrai | United Kingdom | First successful use of massed tanks in combat. |
| 1925 | Rif War | France Spain | First modern amphibious assault using tanks and aircraft. |
| 1937 | Bombing of Guernica | Germany Italy | First major use of terror bombing. |
| 1937 | Battle of El Mazuco | Spain Germany | First major use of carpet bombing against a military target. |
| 1940 | Battle of Britain | Germany United Kingdom | First major battle to be fought entirely in the air. |
| 1940 | Battle of Taranto | United Kingdom | First naval battle in which one side only employed aircraft. |
| 1941 | Battle of Crete | Germany | First major battle in which one side only employed airborne forces. |
| 1941 | Operation Barbarossa | Germany Soviet Union | High point of Blitzkrieg warfare. Largest invasion in history. |
| 1942 | Battle of the Coral Sea | Japan United States | First naval battle in which neither side's ships sighted or fired directly upon each other. |
| 1942 | Battle of Midway | Japan United States | Decisive battle between aircraft carriers. |
| 1942 | Battle of Stalingrad | Germany Soviet Union | Largest single battle in history. Decisive battle of the Nazi-Soviet War. |
| 1942 | Battle of Guadalcanal | Japan United States | First major air-land-sea campaign in history. |
| 1943 | Battle of Kursk | Germany Soviet Union | Largest tank battle in history. |
| 1944 | Normandy Invasion | United Kingdom United States Canada | Largest seaborne invasion in history. |
| 1944 | Battle of Leyte Gulf | Japan United States | Largest naval battle in history. |
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