1946 - 1948: Russian aggression in Europe - 100% appeasement
1950 - 1953: Korea - almost defeated, turned it around and nearly reached the Yalu. PRC upped the ante - we sued for peace.
1962 - USSR/Cuba place IRBMs in Cuba. We laid a blockade. But USSR refused to remove missiles unless we set aside the Monroe Doctrine by agreeing never to invade Cuba.
1964 - 1975: With insane rules of engagement, we tried to appear to stand up to Communist aggression in SE Asia but never really fought all out. We were afraid that the PRC and or the USSR would formally declare war on us and use nukes. Ended in shameful defeat.
1972: US falls for the China Card, leading to an increasing pattern of appeasement of Red China, still going on today.
1978: US sells Taiwan down the river and supports the end of formal diplomatic relations. "One China" policy of appeasement born.
1978: USSR invades Afghanistan. No response from US / NATO. Later, Reagan would fund only a covert response.
1979 - 1981: Iran Hostage crisis.
1985: Marines evacuate Beirut.
Etc, etc, etc. MAD is mad! Appeasement only builds up the pressure for great war!
Thought you might have a few to add to the hall of (MSM fomented, UN bootlicker driven) shame...