What type of government did charlemagne establish

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?

What were some of the new consumer appliances that americans could purchase in the 1920s

What event ultimately started world war 2 and ended britain and frances attempt to prevent war?