[Reily]

Which Greco-Turkish War are you talking about?
In the one fought 1919-1922 the Greeks couldn’t keep the Ottoman territory given to them by the Allies. They didn’t lose mainland Greece.

https://en.wikipedia.org/wiki/Greco-Turkish_War_(1919%E2%80%931922)

[DJ MacWoW]

The prince was born during the Greco-Turkish War and his very first years of childhood were not the calmest ones. His uncle Constantine I, the King of Greece at that time, was forced to abdicate when the war was over in 1922. Constantine I and Philip’s father were arrested, while Princess Alice and her entire family had to live under constant surveillance.

In December 1922, Prince Andrew was banished from Greece for life by a revolutionary court, thus forcing his family to evacuate to France. It is known that Prince Philip was carried in a fruit box all the way from Greece to France to be kept safe.

Prince Philip Royal Family Tree: Past and Future Generations