An eight-nation conference opened in Manila on September 6, 1954, to
create a treaty designed to prevent communist aggression is Southeast
Asia. The United States, Britain, France, Australia, New Zealand, the
Philippines, Thailand, and Pakistan signed the Southeast Asia Collective
Defense Treaty (also know as the Manila Pact) on September 8, 1954. The
agreement created the Southeast Asia Treaty Organization (
SEATO) which operated from 1955 to 1977.
In 1954, the Bureau of Posts overprinted and surcharged definives stamps to mark the
Manila Conference.
On September 8. 1959, the fifth anniversary of the signing of the Manila Pact, two commemorative stamps were issued featuring the Philippines Congress Building (now the National Museum), the site of the Manila Conference of 1954.
Congress of the Philippines
First Day of Issue Cancellation
The SEATO emblem was included in the first day of issue cancellation.
First Day Covers
Overseas Mailers
1960 SEATO Conference Washington
The Sixth Annual Conference of SEATO began in Washington on May 31, 1960. The U.S. issued a 4 cent commemorative stamp to mark the occasion.