Origins of the Cold War
Australia's entry into the Cold War came in 1950, when it rushed combat air and sea forces into the Korean War, two days after the Americans did. The Australian Prime Minister received a hero's welcome in Washington. The ANZUS military alliance with New Zealand and the United States was signed in July 1951; it was a plan for consultation and did not involve military planning like NATO. Public opinion in Australia was intensely hostile to Japan after its wartime atrocities, but Japan was now an ally in the Cold War, so Australia's accepted the very generous soft peace treaty with Japan in 1951. Instead of worrying about a resurgent Japan, Australia now worried more about a possible Chinese threat.
United States Navy SEALs
The Korean War began on 25 June 1950, when the North Korean army invaded South Korea. Beginning with a detachment of 11 personnel from UDT 3, UDT participation expanded to three teams with a combined strength of 300 men. During the "Forgotten War" the UDTs fought intensively, beginning to employ demolition expertise gained from WWII and use it for an offensive role. Continuing to use water as cover and concealment as well as an insertion method, the Korean Era UDTs targeted bridges, tunnels, fishing nets and other maritime and coastal targets. They also developed a close working relationship with the Republic of Korea Underwater Demolitions Unit (predecessor to the Navy Special Warfare Flotilla), which continues today.