Question: Q1: In what unofficial ceasefire was Alfred Anderson the last known combatant to participate in.
Sentence (from "Alfred Anderson (veteran)"): He was the last known holder of the 1914 Star (the Old Contemptibles), the last known combatant to participate in the 1914 World War I Christmas truce, Scotland's last known World War I veteran, and Scotland's oldest man for more than a year.
Relevant evidence: Yes