[1][a] It went to Woolwich about 250 strong on 12 August, from where it supplied reinforcements to RGA units fighting on the Western Front, at Gallipoli and in Egypt.

[11][12] On 5 March the battery received orders to join in the Kilimanjaro offensive with 2nd Division of the East African Expeditionary Force.

It moved out via the Serengeti rail head and on 9 March took part in a demonstration against Salaita Hill (where the Imperial forces had been repulsed the previous month).

Once back on the road the battery had to wait for its lorries to bring up supplies while its smiths and fitters worked to repair the German light railway.

[2][15][16][17] During August the battery supported the 1st East African Brigade, which was to attack Ruhungo, but flanking moves caused the Germans to retire and the guns were not needed.

On 31 December it moved into prepared positions about 500 yards (460 m) behind the front line trenches and established an observation post (OP) on Kitoho Hill.

During the engagement one of the battery's guns suffered a premature shell burst, which blew away 6 inches (15 cm) of the muzzle, killing one gunner and wounding three others.

Leaving some men to operate a Stokes mortar battery, the rest of 134th Hvy Bty (32 all ranks) with their 5-inch howitzer, were taken by a Tugboat to Mingoyo, where they bivouacked at Lower Schaadel Farm with an escort from the KAR.

They adapted two Flat wagons so that the howitzer and its limber could be moved along the German light railway, hauled by local porters.

The battery then advanced about 6 miles (9.7 km) along the rail line to a new camp, and on each of the next few days moved out to various positions for shoots on Narunyu on the bank of the Lukuledi River.

On 29 and 30 August both howitzers and the Stokes mortars fired at targets to try to get the enemy to reveal their positions, despite a large number of misfires from the old 5.4-inch.

The roads were impassable for the heavy lorries, so the two howitzers with the force reserve (one 5-inch had blown out an oil pipe in its recoil mechanism) had to move up on their railway trollies to the end of the line at Mtua (28 September) and then be dragged forward by porters while light Ford cars brought up ammunition.

[2][30][31][32] However, the German force had also lost heavily, and it began a retirement towards Portuguese Mozambique, harried by a few howitzer rounds each day, though spotting fall of shot in the dense bush was problematic because of wireless difficulties with the Royal Naval Air Service observation aircraft.

The Allied forces had to reorganise for this phase of the campaign, and 134th Hvy Bty's slow-moving howitzers returned to Nyangao on the Lukuledi by the end of the month.

[2][36][37][38][39] On 19 December 1917, 134th (Cornwall) Heavy Battery, with 5 officers and 59 other ranks, embarked on the SS Caronia at Dar es Salaam en route for Durban and then England.