In 3–5 sentences, interpret how the government attempted to gain citizens’ cooperation using this war poster.

In the context of this poster, "loose talk" means to conversation/gossip and "cost lives" refers to the war currently going on. The exclamation, "Quiet!" warns the public to not gossip about matters that could make the war worse or put the country at risk. Examples of these matters might include war plans or even negative information about the United States government.

it should definitely consists of the total amount of the entry which hindered the diary of how most conflictions and opinions in the 1800s experiences.