August 1, 1291 July sixth days) (��î years, the Swiss independent. In In In 1291, three Swiss Valley Community: Uri, Schwyz, and Unterwalden signed the Tri-State League Agreement. The alliance treaty provisions of the three required to help each other to fight against all internal and external enemies; common law to ensure local stability; alliance between the differences must be resolved peacefully through negotiation; and provides for the alliance of the Parties shall accept the non-local, or for the sake of money and law enforcement officials to be appointed. This alliance agreement is the first agreement of Swiss history documented, and thus the Swiss today regarded as the birth date of the Swiss Confederation, in August 1291 and August 1 of each year as the Swiss National Day. (History TodayOnHistory.com)