Distrust of Europe nations led the great powers to sign treaties pledging to defend one another this is called

what are local authorities doing to fix the problem

explanation:

it would be  

germany had to pay all damages related to the war.

and i think

germany had to take sole responsibility for the war.

new evidence is discovered.

oversights and errors are corrected,

new technology is applied to evidence.

c) troops march forward in close formation against newer, more accurate weapons