This is a list of wars involving the Republic of Liberia.
Russia (1914–17) Japan Italy (1915–18) United States (1917–18) Serbia Montenegro Belgium Romania (1916–18) Portugal (1916–18) Brazil (1917–18) Hejaz (1916–18) China (1917–18) Greece (1917–18) Siam (1917–18) Liberia (1917–18) Supported by: Libya Burkina Faso United Kingdom ECOMOG Forces Executive Outcomes Supported by: Guinea United States
Supported by: Sierra Leone Guinea United Kingdom United States