Although the unit saw no active service, it supplied trained gunners to siege batteries engaged on the Western Front during World War I.

When the Territorial Force (TF) was created from the old Volunteer Force under the Haldane Reforms of 1908, a new 'defended ports' artillery unit was formed with its headquarters (HQ) at Broughty Ferry, now located within the Dundee City council area on the north bank of the Firth of Tay.

[9] By October 1914, the campaign on the Western Front was bogging down into Trench warfare and there was an urgent need for batteries of Siege artillery to be sent to France.

The WO decided that the TF coastal gunners were well enough trained to take over many of the duties in the coastal defences, releasing Regular RGA gunners for service in the field, and 1st line RGA companies that had volunteered for overseas service had been authorised to increase their strength by 50 per cent.

By April 1918 the Aberdeen and Tay defences under No 22 Coastal Fire Command (Broughty Ferry) consisted of:[1][13][14][15][16] 67th Siege Battery was formed under War Office Instruction 144 of October 1915 from one company of the North Scottish RGA (TF).

[23][24] It was one of the groups assigned to XV Corps facing the Fricourt Salient, a position of considerable strength in the German line.

[27] When the infantry launched their assault at 07.30 on Z Day (1 July), XV Corps made better progress than most other parts of the front, capturing Mametz and Fricourt.

[19] The battery joined VI Corps' Heavy Artillery in Third Army on 2 February 1917, employed in digging positions while their guns were not in action.

However, the follow-up over succeeding days was less successful, the guns having to be moved forward through mud and destruction, and the later bombardments were rushed and less effective.

The Battles of the Menin Road, Polygon Wood and Broodseinde were highly successful because of the weight of artillery brought to bear on German positions.

[39] Third Army joined in the Allies' victorious Hundred Days Offensive with the Battle of Albert on 23/24 August when it swept across the old Somme battlefields.

[39][40] By the end of August 62nd Bde RGA was with XVII Corps, attacking the Drocourt-Quéant Switch Line on 2 September.

No preliminary barrage was fired, the infantry attacking at 02.00 under a full moon to achieve surprise, supported by 62nd Bde.

[18][19][50] The battery went out to the Western Front on 7 June 1916 and joined 30th HAG with Fourth Army in time for the Battle of the Somme.

At this time, Fourth Army was following the German retirement to the Hindenburg Line (Operation Alberich) and gun sites and ammunition dumps had to be laboriously relocated.

Later, Fourth Army spent the summer months on the Flanders coast, waiting to cooperate with a breakthrough at the Ypres Salient that never came.

By the Battle of the Selle on 17 October the 6-inch howitzer batteries of 47th Bde were supporting XIII Corps, with vigorous CB work and concentrations on important localities.

[51][52][53] XIII Corps' follow-up attack on 23 October was accompanied by equally powerful support, even though poor weather on the preceding days limited air observation and spotting of enemy batteries.

[51][54][55] XIII Corps halted its pursuit on 9 November and only light forces maintained touch with the retreating Germans until the Armistice.

[51] 109th Siege Battery was to have become C Bty in LXXIII Bde RGA in the postwar army, but was disbanded after the Treaty of Versailles was signed.

[2][3][56][58][59] At this time medium brigades consisted of one battery of six 60-pounder guns and three of six 6-inch howitzers, all of World War I vintage but which by 1937 had been modernised with pneumatic tyres.

[61][65][66][71] When the TA was reconstituted on 1 January 1947, 504th and 507th Coast Rgts were amalgamated once more to form 362 Medium Regiment with RHQ at Montrose.