Mars van het Prinses Irene Brigade - March of the Princess Irene Brigade.
The Royal Netherlands Motorized Infantry Brigade, later known as the Princess Irene Brigade (Dutch: Prinses Irene Brigade) was a Dutch military unit initially formed from approximately 1,500 troops, including a small group guarding German prisoners-of-war, who arrived in the United Kingdom in May 1940 following the collapse of the Netherlands. Elements of this force became the nucleus of what was originally called the "Dutch Legion."
The photo is of HRH Prince Bernhard of the Netherlands visiting the Prinses Irene Brigade.