pā near Lake Karapiro. Cameron switched his attention to Tauranga, arriving there on 21 April in and established his headquarters at Tauranga. In addition to the reinforcements on Esk, more from Auckland arrived on . Within days Cameron decided he had sufficient forces to finally march against Gate Pā. On the afternoon of 28 April, Cameron launched an hour-long attack on the front of Gate Pā with four batteries of artillery placed at a range of between 350 and 800 metres. The battery—the heaviest used in the wars of 1863–1864—included a 110-pounder Armstrong gun, two 40-pounder and two six-pounder Armstrongs, two 24-pounder howitzers, two eight-inch mortars, and six Coehorn mortars. According to accounts by Hēni Te Kiri Karamū and Hōri Ngātai, the first victims of the British cannon shots were Church of England ministers conducting prayers. Late in the night Greer moved his 700 men from the 68th Regiment across swamps to the east of Gate Pā under cover of darkness and rain to take up a position to the rear of the redoubt to cut off a Māori retreat. Those forces were joined by a detachment of the Naval Brigade from the warships Esk, Falcon and . By daybreak on 29 April Cameron had a total of about 1650 men surrounding the pā: 700 of the 68th Regiment, 420 from the Naval Brigade, 300 of the 43rd Regiment, 50 Royal Artillery, and another 180 members of the 12th, 14th, 40th and 65th Regiments. At first light on 29 April the assembled guns and mortars opened fire again, this time maintaining the bombardment for more than eight hours. They destroyed the palisade and completely suppressed Māori gunfire. An estimated 30 tonnes of shell and shot were dropped on or near the Māori position, killing about 15 of the defenders. At about 4pm, with no sign of life in the pā, Cameron ordered an assault by 300 men—a combined force of Naval Brigade under Commander Hay and the 43rd Regiment, led by Lieutenant-Colonel H.G. Booth—who ran in four abreast with fixed bayonets. Another 300 men followed at a distance as a reserve. Some in the initial British assault force were shot as they entered the main pā, and inside the redoubt more fell as they engaged in hand-to-hand combat with Māori armed with shotguns and mere (short clubs). A lull of about five minutes occurred, during which time Captain G.R. Greaves,