What does the following excerpt mean: “we request that you keep the source of the information secret but put no prohibition on the publication of the zimmerman telegram itself…"

It means that they are allowed to talk about it, publishing it, but they could not show what was the Zimmerman's telegram message.

"We won't tell you what they said, but trust me, IT'S BAD" considering that the Kaiser promised Mexico the lands the USA took from them in exchange for help fighting the americans. This was one great reason why USA joined the WWI against the German Forces.

well we know that it was fought between america and the united kingdom based on that i assume people consider the second war of independence because brtiain and england (uk)   the uk is made up of england and i assume thats why it was considered that

it would be a. that is the only one i could think of