Petrus Jozef Sietze "Piet" de Jong
(known as 'Oom Piet', or 'Uncle Piet') (born 3 April 1915) is a retired Dutch
politician. He was prime minister of the Netherlands
from 1967 until 1971. He was also a member of the catholic KVP
Early years and service
De Jong was born in Apeldoorn
and graduated from the Royal Netherlands Naval College
in 1934 after which he served as a naval officer. During World War II
he commanded the Dutch submarine
'Hr. Ms. 0-24'. In 1947 he joined the Naval Staff. In 1951 and 1952 he commanded the frigate
'Hr. Ms. De Zeeuw'. He then joined the 'Allied Commander-in-Chief Channel' in Portsmouth
. In 1955 he was appointed acting chief of staff of the Navy Inspector-General, Bernhard of Lippe-Biesterfeld
, and Aide-de-camp
of the latter's wife Queen Juliana of the Netherlands
. In 1958 he commanded the destroyer 'Hr. Ms. Gelderland'.
He became involved in politics in 1959, being appointed deputy minister of defence. In 1963 he became minister of defence and in 1967 he became prime minister.