World War I

The brigade was part of 2nd Division. It was composed as follows;

• 1st Battalion, The King's (Liverpool Regiment)
• 2nd Battalion, The South Staffordshire Regiment
• 13th (Service) Battalion (West Ham), The Essex Regiment
• 1st Battalion, the King's Royal Rifle Corps
  King's Royal Rifle Corps
  The King's Royal Rifle Corps was a British Army infantry regiment, originally raised in colonial North America as the Royal Americans, and recruited from American colonists. Later ranked as the 60th Regiment of Foot, the regiment served for more than 200 years throughout the British Empire...
  
   (to 99th Bde. December 1915)

The following battalions were part of the brigade during 1915.

• 1st Battalion, the Royal Berkshire Regiment
  Royal Berkshire Regiment
  The Royal Berkshire Regiment was an infantry regiment of the line in the British Army, formed in 1881 by the amalgamation of the 49th Regiment of Foot and the 66th Regiment of Foot.The regiment was originally formed as The Princess Charlotte of Wales's , taking the...
  
   (August 1914 to December 1915)
• 1/5th Battalion, The King's (Liverpool Regiment) (February 1915 to December 1915)
• 1/7th Battalion, The King's (Liverpool Regiment) (March 1915 to September 1915)
• 1/1st Battalion, The Hertfordshire Regiment (August 1915 to June 1916)

The 17th Battalion of the Royal Fusiliers joined the brigade from
the 5th Brigade in February 1918.

World War II

At the outbreak of war in 1939 the 6th Infantry was part of the 2nd Infantry Division

British 2nd Infantry Division

The 2nd Division is a regular division of the British army, with a long history. It dates its existence as a permanently embodied formation from 1809, when it was established by Lieutenant General Sir Arthur Wellesley , as part of the Anglo-Portuguese Army, for service in the Peninsular War...

. In 1939 the brigade moved with the 2nd Infantry Division to France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

 and was involved in the short Battle of France

Battle of France

In the Second World War, the Battle of France was the German invasion of France and the Low Countries, beginning on 10 May 1940, which ended the Phoney War. The battle consisted of two main operations. In the first, Fall Gelb , German armoured units pushed through the Ardennes, to cut off and...

 fighting at the Battles of The Dyle, St Omer-La Bassée and the retreat to and evacuation from Dunkirk in 1940.

With the invasion of Burma by the Japanese Army

Imperial Japanese Army

-Foundation:During the Meiji Restoration, the military forces loyal to the Emperor were samurai drawn primarily from the loyalist feudal domains of Satsuma and Chōshū...

 the brigade was shipped out to India

India

India , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...

 where it would remain for the rest of the war fighting in the Burma Campaign

Burma Campaign

The Burma Campaign in the South-East Asian Theatre of World War II was fought primarily between British Commonwealth, Chinese and United States forces against the forces of the Empire of Japan, Thailand, and the Indian National Army. British Commonwealth land forces were drawn primarily from...

. It fought in the Battles of Kohima

Battle of Kohima

The Battle of Kohima was the turning point of the Japanese U Go offensive into India in 1944 in the Second World War. The battle was fought from 4 April to 22 June 1944 around the town of Kohima in northeast India. It is often referred to as the "Stalingrad of the East".The battle took place in...

 and Mandalay.

1939–1945

• 1st Bn, The Royal Berkshire Regiment
• 1st Bn, The Royal Welch Fusiliers
• 2nd Bn, Durham Light Infantry
  Durham Light Infantry
  The Durham Light Infantry was an infantry regiment of the British Army from 1881 to 1968. It was formed by the amalgamation of the 68th Regiment of Foot and the 106th Regiment of Foot along with the militia and rifle volunteers of County Durham...
  
  
• 1st Bn, East Lancashire Regiment
  East Lancashire Regiment
  The East Lancashire Regiment was, from 1881 to 1958, an infantry regiment of the British Army. The regiment was formed under the Childers Reforms by the amalgamation of two 30th and 59th Regiments of Foot with the militia and rifle volunteer units of eastern Lancashire...
  
  
• 1st Bn, Royal Scots
• 99th (Buckinghamshire Yeomanry) Field Regiment, Royal Artillery
  Royal Artillery
  The Royal Regiment of Artillery, commonly referred to as the Royal Artillery , is the artillery arm of the British Army. Despite its name, it comprises a number of regiments.-History:...