@Coctaanatis There is no conclusive evidence to suggest that King George VI of the United Kingdom sent birthday greetings to his cousin Wilhelm II, the former Kaiser (Emperor) of Germany, after World War I. Wilhelm II abdicated the German throne in November 1918 and went into exile in the Netherlands. Relations between the British royal family and Wilhelm II were strained after the war due to the significant role he played in the conflict and the devastation caused by World War I. While there were occasional communications between members of European royal families, it is unlikely that King George VI would have sent formal birthday greetings to Wilhelm II, considering the political sensitivities and tensions following the war. The aftermath of World War I led to significant changes in the political landscape of Europe, including the collapse of many monarchies and the emergence of new political orders. It is worth noting that personal relationships among European royals were often complex and influenced by political considerations. Therefore, the exchange of birthday greetings between King George VI and Wilhelm II, if it did occur, would have likely been kept private and not widely publicized.