I am particularly interested in the United Fruit Company's involvement in Panama, as it has come to light through my grandmother that my great-grandfather did work for there for the UFC. He was invited to have dinner on a ship in the Great White Fleet (my mother has the actual silk-corded white invitation somewhere with the dinner menu inside). He took a picture of a ship flying the Nazi swastika flag in locks at the Panama Canal. I was confused by this, as this was in 1946 or 1947. Does anyone have any information or reading recommendations on the circumstances for a Nazi ship in the Canal after the war and/or the United Fruit company in Panama during that time period?