The correct answer to this open question is the following.
The Hartford Convention was held on December 15, 1814. The location for the meeting was the Old State House. The convention was a secret. The initiative for the meeting came from the Massachusetts legislature and delegates participated from Vermont, Connecticut, New Hampshire, and Rhode Island. The resolution of the convention was that these states drafted a severe protest against the government of the United States for its participation in the War of 1812. Those were the issues presented in the declaration. That is when the first conversations about the idea of secession were introduced. Specifically, the New England Federalists feared that those kinds of suppositions could lead the nation to a civil war. The conclusions of the Convention were issued on January 15, 1815.
