Argentine

The history of the Argentine military in the 19th and first half of the 20th century is rich and complex. During this period, Argentina fought in several civil wars, as well as wars with Chile and Paraguay. In the 20th century, Argentina participated in both World War I and World War II, as well as numerous local conflicts.

19th century

In the 19th century, the Argentine army was divided into two main factions: the federalists and the unitarians. The federalists, who supported the power of local caudillos, were generally in favor of war with Chile and Paraguay. The unitarians, who supported a strong central government, were generally in favor of peace.

In 1810, Argentine patriots revolted against Spanish rule. The revolt was successful, and Argentina gained independence in 1816. However, independence did not bring peace. Between 1816 and 1880, Argentina fought in several civil wars.

In 1825, Argentina declared war on Chile. The war ended in 1828 with a Chilean victory. In 1865, Argentina, Brazil, and Uruguay declared war on Paraguay. The war ended in 1870 with a Paraguayan defeat and the deaths of about 90% of the country’s male population.

20th century

In the 20th century, Argentina participated in both World War I and World War II. In World War I, Argentina remained neutral. In World War II, Argentina was initially neutral, but in 1944 it severed diplomatic relations with Germany and Japan.

After World War II, Argentina participated in numerous local conflicts. Between 1955 and 1983, Argentina was ruled by military dictatorships. During this period, the military had a major influence on Argentine political and social life.

More detailed info on Wikipedia here.