Australia's constitution gives military command to the Governor-General, who never actually uses it
On paper, a commander-in-chief holds supreme authority over a nation's armed forces. In practice, the title often belongs to a monarch, a governor-general or a ceremonial president who never issues an order, while the real decisions sit with prime ministers, cabinets and defence ministers. The English phrase itself dates from the English Civil War.
The label shifts with language. English-speaking countries tend to say commander-in-chief, French-speaking ones prefer chief of armies, much of continental Europe uses supreme commander, and the Soviet Union and its successor states adopted supreme commander-in-chief. Heads of state commonly hold the post even when a separate head of government wields executive power, and the title has also gone to officers leading large forces and to colonial governors in their territories.
Australia shows how wide the gap between text and reality can be. Its constitution vests command of the naval and military forces in the Governor-General as the monarch's representative, yet the Governor-General plays no active part in the chain of command; the cabinet, chaired by the prime minister, controls the defence force in practice through the defence minister, as the Defence Act of 1903 lays out. Canada works similarly, with command powers held by the monarch, delegated to the governor general, and exercised on the advice of the prime minister and cabinet. In Belgium the constitution names the king, but the chief of defence actually runs the forces and reports to the defence minister.
Other systems split authority in different ways. Czech presidents command the armed forces, but their military decisions need the prime minister's countersignature to be valid, and parliament must consent before troops leave the country. In Bosnia and Herzegovina a collective presidency holds the role. In China, direction of the armed forces rests with the Central Military Commission rather than the state presidency, although since 1993, under Jiang Zemin, the party leader, president and commission chairman have normally been the same person.
History leaves its own titles. Ancient and medieval Armenia called its supreme commander the sparapet, a hereditary rank introduced in the 2nd century BC and still used for celebrated generals. Croatia created a special rank for the role under Franjo Tudjman and abolished it after his death, while Barbados moved the function from the British monarch to its own president when it became a republic in 2021.
Source: Commander-in-chief
