Somme 1918 (Battle honour)
Somme 1918 was a battle honour awarded to units of the British and Imperial Armies that took part in one or more of the following engagements in the Great War:
First Battle of the Somme (1918), 21 March – 5 April 1918
Second Battle of the Somme (1918), 21 August – 5 September 1918

These should not be confused with the Battle of the Somme of 1916. References

Battle honours of the British Army