Which event led to the official entry of the United States into world war ||?

How would you describe the state of germany between 1815 and 1848

What was the result of delegates from the democratic party not being able to nominate a candidate in 1860

President of the united states has scheduled a cabinet meeting today to discuss energy policy with specific focus on pollution and global warming. given what you know of the executive branch, which group of attendees would the president most likely expect to provide up-to-date information and expert insight during this meeting?