February 2, 1972:
OTL*: Anti-British riots take place throughout Ireland. The British Embassy in Dublin is burned to the ground, as are several British-owned businesses.Strangers' World: Anti-British sentiment is still strong in Ireland but the government of Eire, feeling a total lack of international support, does everything possible to suppress any kind of public protest, least to say an attack on the embassy. Probability: low.
OTL: The last draft lottery is held, a watershed event in the wind-down of military conscription in the United States during the Vietnam era. These draft candidates are never called to duty.
Strangers' World: The United States have nothing to search in Vietnam and other parts of French Indochina, controlled by Japan since late 1940s. Probably the U.S. Army (and/or Marines) is involved in some mess in Central America, trying to handle it with a relatively small expeditionary force. No conscription required. Probability: zero.
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* OTL = Our Timeline = Real History
Read also: Reality vs Alternative