By the Numbers
From multi-decade campaigns to centuries-long struggles — every conflict ranked by duration.
793–1066 · 12 battles · 400,000 dead
274 years
475 – 221 BC · 13 battles · 3,500,000 dead
255 years
1095 – 1291 · 8 battles · 1,500,000 dead
197 years
1206 – 1368 · 8 battles · 35,000,000 dead
163 years
632 – 750 AD · 12 battles · 600,000 dead
119 years
264–146 BC · 10 battles · 650,000 dead
119 years
1337–1453 · 11 battles · 2,800,000 dead
117 years
376 – 476 AD · 8 battles · 600,000 dead
101 years
184 – 280 · 12 battles · 10,000,000 dead
97 years
1568 – 1648 · 16 battles · 600,000 dead
81 years
66 – 136 AD · 8 battles · 1,300,000 dead
71 years
1494 – 1559 · 13 battles · 300,000 dead
66 years
1618 – 1683 · 11 battles · 25,000,000 dead
66 years
1296 – 1357 · 13 battles · 75,000 dead
62 years
1560 – 1615 · 15 battles · 250,000 dead
56 years
499–449 BC · 10 battles · 350,000 dead
51 years
235 – 284 AD · 12 battles · 1,750,000 dead
50 years
768 – 814 AD · 10 battles · 250,000 dead
47 years
1947 – 1991 · 14 battles · 22,000,000 dead
45 years
1370 – 1405 · 10 battles · 17,000,000 dead
36 years
1965 – 1999 · 11 battles · 13,000 dead
35 years
1455–1487 · 11 battles · 60,000 dead
33 years
1860s – 1890 · 11 battles · 103,000 dead
31 years
1968 – 1998 · 12 battles · 3,600 dead
31 years
1618–1648 · 11 battles · 7,450,000 dead
31 years
12 BC–16 AD · 11 battles · 55,000 dead
29 years
1975 – 2002 · 9 battles · 500,000 dead
28 years
431–404 BC · 10 battles · 255,000 dead
28 years
602 – 628 AD · 9 battles · 500,000 dead
27 years
1880 – 1902 · 12 battles · 77,000 dead
23 years
533 – 554 AD · 10 battles · 520,000 dead
22 years
1839–1860 · 13 battles · 23,000 dead
22 years
2001 – 2021 · 12 battles · 164,000 dead
21 years
1955 – 1975 · 8 battles · 3,600,000 dead
21 years
1881 – 1899 · 11 battles · 110,000 dead
19 years
49–31 BC · 12 battles · 460,000 dead
19 years
1683 – 1699 · 10 battles · 400,000 dead
17 years
1994 – 2009 · 11 battles · 175,000 dead
16 years
1975 – 1990 · 12 battles · 150,000 dead
16 years
1519 – 1533 · 15 battles · 8,061,000 dead
15 years
1850 – 1864 · 7 battles · 25,000,000 dead
15 years
336–323 BC · 12 battles · 400,000 dead
14 years
1791 – 1804 · 11 battles · 229,000 dead
14 years
2011 – 2024 · 19 battles · 504,118 dead
14 years
1701–1714 · 11 battles · 1,600,000 dead
14 years
1803 – 1815 · 14 battles · 6,500,000 dead
13 years
1792–1802 · 11 battles · 1,250,000 dead
11 years
1910 – 1920 · 12 battles · 1,250,000 dead
11 years
1979–1989 · 10 battles · 1,035,000 dead
11 years
1991 – 2001 · 11 battles · 140,000 dead
11 years
1642–1651 · 11 battles · 185,000 dead
10 years
1754 – 1763 · 8 battles · 200,000 dead
10 years
2011 – 2020 · 14 battles · 40,020 dead
10 years
1954 – 1962 · 11 battles · 478,600 dead
9 years
1775 – 1783 · 14 battles · 75,000 dead
9 years
755 – 763 AD · 11 battles · 12,750,000 dead
9 years
58–50 BC · 12 battles · 1,000,000 dead
9 years
1980 – 1988 · 11 battles · 600,000 dead
9 years
2003 – 2011 · 10 battles · 255,000 dead
9 years
1937 – 1945 · 11 battles · 21,255,700 dead
9 years
1740–1748 · 11 battles · 1,200,000 dead
9 years
1756 – 1763 · 8 battles · 2,400,000 dead
8 years
1592 – 1598 · 15 battles · 1,260,000 dead
7 years
1939 – 1945 · 21 battles · 80,000,000 dead
7 years
1960 – 1965 · 10 battles · 100,000 dead
6 years
1066 – 1071 · 7 battles · 135,000 dead
6 years
1917 – 1922 · 12 battles · 10,500,000 dead
6 years
1879 – 1884 · 11 battles · 70,000 dead
6 years
1861 – 1865 · 21 battles · 670,000 dead
5 years
1975 – 1979 · 10 battles · 2,000,000 dead
5 years
1914 – 1918 · 15 battles · 19,700,000 dead
5 years
1967 – 1970 · 12 battles · 2,000,000 dead
4 years
1853 – 1856 · 12 battles · 500,000 dead
4 years
1950 – 1953 · 11 battles · 3,200,000 dead
4 years
1899 – 1902 · 14 battles · 224,200 dead
4 years
1936–1939 · 11 battles · 525,000 dead
4 years
1812 – 1815 · 11 battles · 23,000 dead
4 years
1899 – 1901 · 10 battles · 125,000 dead
3 years
1846 – 1848 · 11 battles · 54,283 dead
3 years
1948 – 1949 · 11 battles · 21,273 dead
2 years
1912 – 1913 · 11 battles · 300,000 dead
2 years
1870 – 1871 · 9 battles · 239,000 dead
2 years
1990 – 1991 · 11 battles · 28,792 dead
2 years
1857 – 1858 · 6 battles · 898,000 dead
2 years
1904 – 1905 · 11 battles · 160,000 dead
2 years
1877 – 1878 · 12 battles · 450,000 dead
2 years
1939 – 1940 · 11 battles · 151,957 dead
2 years
1879 · 5 battles · 14,700 dead
1 year
1982 · 10 battles · 907 dead
1 year
2023 – Present · 17 battles · 75,300 dead
1 year
1453 · 10 battles · 35,000 dead
1 year
2014 – Present · 21 battles · 570,000 dead
1 year
1994 · 10 battles · 800,000 dead
1 year
1967 · 10 battles · 22,000 dead
1 year
1898 · 11 battles · 463,289 dead
1 year
2023 – Present · 13 battles · 265,000 dead
1 year
1956 · 10 battles · 4,404 dead
1 year
2025 – Present · 13 battles · 7,845 dead
1 year
1973 · 11 battles · 15,200 dead
1 year