The Territorial Force Imperial Service Badge was a short lived decoration of the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 awarded to those members of the Territorial Force

Territorial Force

The Territorial Force was the volunteer reserve component of the British Army from 1908 to 1920, when it became the Territorial Army.-Origins:...

 who were prepared to serve outside the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 in defence of the Empire

British Empire

The British Empire comprised the dominions, colonies, protectorates, mandates and other territories ruled or administered by the United Kingdom. It originated with the overseas colonies and trading posts established by England in the late 16th and early 17th centuries. At its height, it was the...

.
The conditions of enlistment for the TF laid down at their creation in 1908 did not allow for soldiers to be sent for service overseas against their will, as the TF was intended for home defence. However, any man could volunteer for the Imperial Service Section and serve abroad in times of war, which entitled him to wear this badge.

The majority of those who received the award did so for services during the First World War.

This badge became obsolete when the Territorial Force

Territorial Force

The Territorial Force was the volunteer reserve component of the British Army from 1908 to 1920, when it became the Territorial Army.-Origins:...

 was elevated to become the Territorial Army.