The battle with the highest number of casualties was the Battle of (blank). The number of troops killed at Somme was nearly one thousand times the number killed at (blank). This chart demonstrates that casualty rates (blank) during World War I.

the Somme, Bunker Hill, sharply increased.

The battle with the highest number of casualties was the Battle of Somme.  The number of troops killed at Somme was nearly one thousand times the number killed at Bunker Hill. This chart demonstrates that casualty rates sharply increased during World War I.

Explanation:

The Battle of the Somme occurred between July 1 and November 18, 1916, during World War I, in Pas de Calais, in the north of France. There, the allied troops made up of British and French went to meet the German forces, as they aimed to divide the German army that was fighting in Verdun, near the Somme.

This battle ended up being the deadliest of the war, with a total of 300,000 dead on both sides, and more than a million wounded in total. In turn, this battle shows that the military confrontation of the time, based on trench warfare, was absolutely destructive due to the battles and the enormous number of casualties they caused.