Although I was unable to find a definite answer after reading the article on the battle, there were a few references to mustard gas (Sulfur Mustard), so that would be my guess.
The Battle of the Somme began in France near the Somme River.
Some of the equipment used in the Battle of Somme in World War 1 was tanks and airplanes. This was unique as it was the first time these weapons had been significantly used in the war.
swords bayonets canons and smielys
In France, along the western front at a place called Somme. Near the French river Somme.
bomb it.
gas
The Battle of the Somme, or Somme Offensive, occurred between July 1 and November 18, 1916. The importance of air power and the first use of the tank are noted.
The Battle of the Somme occurred on both sides of the Somme River in France. It is also known as the Somme Offensive.
somme
The Battle of the Somme began in France near the Somme River.
Some of the equipment used in the Battle of Somme in World War 1 was tanks and airplanes. This was unique as it was the first time these weapons had been significantly used in the war.
swords bayonets canons and smielys
they would have used rifles
No, the Somme is in France.
Butcher of the Somme
The population of Somme-Vesle is 226.
The population of Somme-Bionne is 54.