Which international agreement involved the United States, Canada, and Mexico?

Under the leadership of President Donald J. Trump, the United States has reached an agreement with Mexico and Canada in the renegotiation of the North American Free Trade Agreement (NAFTA).

Explanation: Hope this was helpful.

                      I haven't heard much

                             about this.

North American Free Trade Agreement which was also called NAFTA

Explanation:

This agreement includes major changes on cars and new policies on labor and environmental standards.

c) troops march forward in close formation against newer, more accurate weapons