The 1st Battalion remained in India, performing internal security duties at the outset of the war.

For the rest of the war, the battalion was employed on internal security duties.

There, the Regiment saw active service performing internal security duties.

The Battalion at that time was deeply involved in internal security duties.

Here they carried out internal security duties, Border patrol and ceremonial duties.

In 1946, the regiment was posted to Greece on internal security duties.

Since 1971 the Pioneers have also been employed in internal security duties all over the Island.

At the end of the war it was transferred to Palestine for internal security duties.

After the war, the regiment served internal security duties in Palestine and was reduced to a single battalion in around 1948.

The brigade was in Sicily for "internal security duties on lines of communications".