- Ancient Wars (1000 BC - 500 AD)
    ├── Trojan War (c. 1194–1184 BC)
    ├── Persian Wars (499–449 BC)
    ├── Peloponnesian War (431–404 BC)
    ├── Wars of Alexander the Great (336–323 BC)
    ├── Punic Wars (264–146 BC)
    ├── Roman Civil Wars (1st century BC – 4th century AD)
    └── Hunnic Invasions (4th–5th century AD)

- Medieval Wars (500 AD - 1500 AD)
    ├── Byzantine-Arab Wars (7th–11th centuries)
    ├── Viking Raids and Invasions (8th–11th centuries)
    ├── Crusades (1096–1291)
    ├── Mongol Invasions and Conquests (1206–1368)
    └── Hundred Years' War (1337–1453)

- Early Modern Wars (1500 AD - 1800 AD)
    ├── Thirty Years' War (1618–1648)
    ├── English Civil War (1642–1651)
    └── American Revolutionary War (1775–1783)

- 19th Century Wars
    ├── Napoleonic Wars (1803–1815)
    ├── American Civil War (1861–1865)
    └── Opium Wars
        ├── First Opium War (1839–1842)
        └── Second Opium War (1856–1860)

- 20th Century Wars
    ├── World War I (1914–1918)
    ├── World War II (1939–1945)
    ├── Korean War (1950–1953)
    ├── Vietnam War (1955–1975)
    └── Cold War (1947–1991)

- 21st Century Wars 
    ├── War on Terror (2001–Present)
    └── Iraq War (2003–2011)
		└── Russo-Ukrainian War (2022–Present)