Know them (gender, age group) Know their Job/Hobbies or lifestyle and tell stories and deliver humor according to that. You should know why they must be there to hear your speech and how much they know about the topic of your speech. Most importantly figure out their attention spam. Put everything together and prepare the perfect speech for their interest.
Other allies of the country with the soviet missles could be angry at Ameica. That would leave them to be hostile. Also, America doesn't want to kill its citizens.
They were harmful to the territory that the discovered because unlike the indigenous and aboriginal troops who used ONLY what the needed. The European explorers took whatever they wanted, and cleared many thriving forests to build cabins and such.
