
In the United Kingdom, one of the monarch’s most important roles is that of Head of the British Armed Forces. For King Charles, this is largely a ceremonial role where decisions are made by the government and the leadership of the armed forces. In many other countries, the head of state also carries out this ceremonial role. There are several other monarchs who are commander-in-chief of their nation’s armed forces.
When monarchs are acting in their capacity as commander-in-chief, they will often meet with members of the armed forces, mark military anniversaries, and present colours to different units. There are several major events are this, such as Trooping the Colour in the United Kingdom.
King Philippe of Belgium serves as the Commander-in-Chief of the Belgian Armed Forces.

King Charles III of the United Kingdom serves as Head of the British Armed Forces and as the Commander-in-Chief in Commonwealth Nations.

The Sultan of Brunei is the Commander-in-Chief of the Royal Brunei Armed Forces.
King Abdullah II serves as the Commander-in-Chief of the Jordanian Royal Forces.
King Harald V of Norway is the Commander-in-Chief of the Norwegian Armed Forces.

King Felipe VI of Spain is the Commander-in-Chief of the Spanish Armed Forces.

King Vajiralongkorn of Thailand serves as the Commander-in-Chief of the Royal Thai Armed Forces.