The 179th Tunnelling Company was one of the tunnelling companies of the Royal Engineers created by the British Army during World War I.
 The tunnelling units were occupied in offensive and defensive mining involving the placing and maintaining of mines under enemy lines, as well as other underground work such as the construction of deep dugouts for troop accommodation, the digging of subways, saps (a narrow trench dug to approach enemy trenches), cable trenches and underground chambers for signals and medical services.
 179th Tunnelling Company is particularly known for its role at L'îlot de La Boisselle and for firing the Lochnagar mine during the Battle of the Somme 1916.
 The "Lochnagar" mine formed part of a series of 19 mines that were placed beneath the German lines on the British section of the Somme front to assist the start of the battle.
The Battle of the Somme (French: "Bataille de la Somme" , German: "Schlacht an der Somme" ), also known as the Somme Offensive, was a battle of the First World War fought by the armies of the British and French empires against the German Empire.
 It took place between 1 July and 18 November 1916 on both sides of the upper reaches of the River Somme in France.
 The battle was intended to hasten a victory for the Allies and was the largest battle of the First World War on the Western Front.
 More than 3 million men fought in this battle and one million men were wounded or killed, making it one of the bloodiest battles in human history.
The Lochnagar mine was an underground explosive charge, secretly planted by the British during the First World War, ready for 1 July 1916, the first day on the Somme.
 The mine was dug by the Tunnelling Companies of the Royal Engineers under a German field fortification known as "Schwabenhöhe" (Swabian Height) in the front line, south of the village of La Boisselle in the Somme "département".
 The British named the mine after Lochnagar Street, the British trench from which the gallery was driven.
 The charge at Lochnagar was one of 19 mines that were placed beneath the German lines on the British section of the Somme front, to assist the infantry advance at the start of the battle.
 The Lochnagar mine was sprung at 7:28 a.m. on 1 July 1916 and left a crater 30 m deep and 100 m wide, which was captured and held by British troops.
 The attack on either flank was defeated by German small-arms and artillery fire, except on the extreme right flank and just south of La Boisselle, north of the Lochnagar Crater.
 The crater has been preserved as a memorial and a religious service is held each 1 July.
The 173rd Tunnelling Company was one of the tunnelling companies of the Royal Engineers created by the British Army during World War I.
 The tunnelling units were occupied in offensive and defensive mining involving the placing and maintaining of mines under enemy lines, as well as other underground work such as the construction of deep dugouts for troop accommodation, the digging of subways, saps (a narrow trench dug to approach enemy trenches), cable trenches and underground chambers for signals and medical services.
 On 17 April 1915, 173rd Tunnelling Company became the first Royal Engineer tunnelling company to fire mines beneath enemy lines.
The 252nd Tunnelling Company was one of the tunnelling companies of the Royal Engineers created by the British Army during World War I.
 The tunnelling units were occupied in offensive and defensive mining involving the placing and maintaining of mines under enemy lines, as well as other underground work such as the construction of deep dugouts for troop accommodation, the digging of subways, saps (a narrow trench dug to approach enemy trenches), cable trenches and underground chambers for signals and medical services.
 252nd Tunnelling Company is particularly known for creating the Hawthorn Ridge mine during the Battle of the Somme 1916, which formed part of a series of mines that were placed beneath the German lines.
The 251st Tunnelling Company was one of the tunnelling companies of the Royal Engineers created by the British Army during World War I.
 The tunnelling units were occupied in offensive and defensive mining involving the placing and maintaining of mines under enemy lines, as well as other underground work such as the construction of deep dugouts for troop accommodation, the digging of subways, saps (a narrow trench dug to approach enemy trenches), cable trenches and underground chambers for signals and medical services.
 On Friday, 10 August 1917, 251st Tunnelling Company fired the last British mine of World War I.
The 255th Tunnelling Company was one of the tunnelling companies of the Royal Engineers created by the British Army during World War I.
 The tunnelling units were occupied in offensive and defensive mining involving the placing and maintaining of mines under enemy lines, as well as other underground work such as the construction of deep dugouts for troop accommodation, the digging of subways, saps (a narrow trench dug to approach enemy trenches), cable trenches and underground chambers for signals and medical services.
The 257th Tunnelling Company was one of the tunnelling companies of the Royal Engineers created by the British Army during World War I.
 The tunnelling units were occupied in offensive and defensive mining involving the placing and maintaining of mines under enemy lines, as well as other underground work such as the construction of deep dugouts for troop accommodation, the digging of subways, saps (a narrow trench dug to approach enemy trenches), cable trenches and underground chambers for signals and medical services.
The 256th Tunnelling Company was one of the tunnelling companies of the Royal Engineers created by the British Army during World War I.
 The tunnelling units were occupied in offensive and defensive mining involving the placing and maintaining of mines under enemy lines, as well as other underground work such as the construction of deep dugouts for troop accommodation, the digging of subways, saps (a narrow trench dug to approach enemy trenches), cable trenches and underground chambers for signals and medical services.
The 258th Tunnelling Company was one of the tunnelling companies of the Royal Engineers created by the British Army during World War I.
 The tunnelling units were occupied in offensive and defensive mining involving the placing and maintaining of mines under enemy lines, as well as other underground work such as the construction of deep dugouts for troop accommodation, the digging of subways, saps (a narrow trench dug to approach enemy trenches), cable trenches and underground chambers for signals and medical services.

Question: 179th Tunnelling Company is known for firing the Lochnagar mine during this battle which was a part of what war?
Answer: First World War