For the remainder of its existence, the Wilts would remain a one battalion regiment.

However, in 2004 it was announced that all remaining single battalion regiments would be amalgamated into large regiments.

In 1799, the 62nd Foot was expanded into a two battalion regiment.

Nine single battalion regiments were disbanded by 1922.

In 1922, the 80th Carnatic Infantry was disbanded, being one of the remaining nine single battalion regiments.

They moved away from single battalion regiments to multi battalion regiments.

By an Act of Congress, dated 28 July 1866, the three battalion regiments were discontinued.

The 31st was reduced to a single battalion regiment in 1814 when the two battalions merged in Sicily.

The regiment was formed through the merger of three single battalion regiments:

Under the Childers reforms of the early 1880s, however, the depot system was altered and expanded to form "territorial" two battalion regiments.