What role did king bans of brittany and king bors of gaul play in the rebellion against arthur?

According to the Arthurian legends, these Kings become allies of King Arthur very early during the rebellion of vassal kings in Britain. They get killed in the battlefield fighting for King Arthur against the Frankish King Claudas, the leader of the rebellion. Their lands are taken by the latter as a prize of war.  

The role that King Bans of Brittany and King Bors of Gaul play in the rebellion against Arthur is that they were his allies in the battle of Bedgrayne.

King Bans, also known as the King of Benwick, was the father of Sir Hector de Maris and Lancelot. He was an ally of King Arthur and also the brother of King Bors.

King Bors was the king of Gaunnes or Gaul in the early period of King Arthur's reign. Both King Bans and Bors appeared in the 13th century Lancelot Grail cycle.

the question concerns exactly this part of the speech:

i am not now thinking of the loss of property involved, immense and serious as that is, but only of the wanton and wholesale destruction of the lives of non-combatants, men, women, and children, engaged in pursuits which have always, even in the darkest periods of modern history, been deemed innocent and legitimate. property can be paid for; the lives of the peaceful and innocent people cannot be.

president wilson talks about the lives of people destroyed by german army. but these people are not americans, they are the local people living in europe. the president mentions the barbarity of germans, considering that he is not targeting the nation, instead it is said about german army. the correct answer is the last one.

bevy means a large group or thing of a certain kind.