Sir Charles William Chadwick Oman KBE (12 January 1860 – 23 June 1946) was a British military historian. His reconstructions of medieval battles from the fragmentary and distorted accounts left by chroniclers were pioneering. Occasionally his interpretations have been challenged, especially his widely copied thesis that British troops defeated their Napoleonic opponents by firepower alone. Paddy Griffith, among modern historians, claims that the British infantry's discipline and willingness to attack were equally important.
Oman was born in Muzaffarpur district, India, the son of a British planter, and was educated at Winchester College and at Oxford University, where he studied under William Stubbs. In 1881 he was elected to a Prize Fellowship at All Souls College, where he remained for the rest of his academic career. He was elected the Chichele Professor of Modern History at Oxford in 1905, in succession to Montagu Burrows. He was also elected to the FBA that year, and served as President of the Royal Historical Society (1917–1921), the Numismatic Society and the Royal Archaeological Institute.
Two of Oman's children became authors. His son Charles (C. C. Oman) wrote several volumes on British silverware and similar houseware, worked as a Keeper of the Department of Metalwork in the Victoria and Albert Museum, and was active in the Folklore Society (and was in turn father to Julia Trevelyan Oman). His daughter Carola was notable for her biographies, especially that of Nelson.
- The Art of War in the Middle Ages (1885)
- "The Anglo-Norman and Angevin Administrative System (1100–1265)", in Essays Introductory to the Study of English Constitutional History (1887)
- A History of Greece From the Earliest Times to the Death of Alexander the Great (1888; 7th ed., 1900)
- Warwick the Kingmaker (1891)
- The Story of the Byzantine Empire (1892)
- The Dark Ages 476–918, Period I of Periods of European History (1893; 5th ed. 1905)
- A History of England (1895; 2nd ed. 1919)
- A History of the Art of War in the Middle Ages, Vol. I: A.D. 378–1278 (1898; 2nd ed. 1924)
- A History of the Art of War in the Middle Ages, Vol. II: A.D. 1278–1485 (1898; 2nd ed. 1924)
- England and the Hundred Years War, 1327–1485 A.D. (1898), No. III of The Oxford Manuals of English History, Charles Oman, ed.
- "Alfred as a Warrior", in Alfred The Great, Alfred Bowker, ed. (1899)
- Reign of George VI, 1900-1925. A Forecast Written in the Year 1763 (preface and notes) (1763; republished 1899)
- England in the Nineteenth Century (1900)
- History of the Peninsular War, Vol. I: 1807–1809 (1902)
- Seven Roman Statesmen of the Later Roman Republic (1902)
- History of the Peninsular War, Vol. II: Jan. 1809-Sep. 1809 (1903)
- "The Peninsular War, 1808–14", in The Cambridge Modern History, Vol. IX, Napoleon (1906)
- "The Hundred Days, 1815", in The Cambridge Modern History, Vol. IX, Napoleon (1906)
- "Inaugural lecture on the study of history" (1906?), in Oxford Lectures On University Studies, 1906–1921 (1924)
- The Great Revolt of 1381 (1906)
- The History of England from the Accession of Richard II. to the Death of Richard III. (1377–1485), Vol. IV of The Political History of England (1906), William Hunt & Reginald Poole, ed.
- History of the Peninsular War, Vol. III: Sep. 1809 – Dec. 1810 (1908)
- A History of England Before the Norman Conquest (1910; 8th ed. 1937), Vol. I of A History of England in Seven Volumes (1904–), Charles Oman, ed.
- History of the Peninsular War, Vol. IV: Dec. 1810 – Dec. 1811 (1911)
- Wellington's Army, 1809–1814 (1912)
- History of the Peninsular War, Vol. V: Oct. 1811 – Aug. 1812 (1914)
- The Outbreak of the War of 1914–18: A Narrative Based Mainly on British Official Documents (1919)
- History of the Peninsular War, Vol. VI: Sep. 1812 – Aug. 1813 (1922)
- The Unfortunate Colonel Despard & Other Studies (1922)
- British Castles (1926)
- "The Duke of Wellington", in Political Principles of Some Notable Prime Ministers of the Nineteenth Century, Fossey John Cobb Hearnshaw, ed. (1926)
- Studies in the Napoleonic Wars (1929)
- History of the Peninsular War, Vol. VII: Aug. 1813 – Apr. 1814 (1930)
- The Coinage of England (1931)
- Things I Have Seen (1933)
- "The Necessity for the Reformation" (1933) (public lecture)
- A History of the Art of War in the Sixteenth century (1937)
- The Sixteenth century (1937)
- On the Writing of History (1939)
- Memories of Victorian Oxford and of Some Early Years (1941)
- The Lyons Mail (1945)
- "OMAN, Charles William Chadwick". Who's Who,. 59. 1907. p. 332.
- "Society Meetings, 18 June 1958". Folklore. 69 (3): 216. 1958. JSTOR 1258870.
- "Minutes of Meeting: June 15, 1949". Folklore. 60 (3): 305. 1949. JSTOR 1256648.
- "Review of History of the Peninsular War, Vol. II, January–September 1809 by Charles Oman". The Athenæum (no. 3953): 145–146. 1 August 1903.
- Works written by or about Charles William Chadwick Oman at Wikisource
- Works by C. W. C. Oman at Project Gutenberg
- Works by Charles William Chadwick Oman at Project Gutenberg
- Works by or about Charles Oman at Internet Archive
- Works by Charles Oman at LibriVox (public domain audiobooks)
|Parliament of the United Kingdom|
Lord Hugh Cecil
|Member of Parliament for Oxford University
1919 – 1935
With: Lord Hugh Cecil
| Succeeded by|
Lord Hugh Cecil
A. P. Herbert
Charles Harding Firth
|President of the Royal Historical Society
| Succeeded by|
John William Fortescue