What is chastise?

Some articles on chastise:

No. 617 Squadron RAF - History - Second World War
... The plan was given the codename Operation Chastise and was carried out on 17 May 1943 ... badge, approved by King George VI, depicts the bursting of a dam in commemoration of Chastise ... The World War II exploits of the squadron and Chastise in particular, were described in Paul Brickhill's 1951 book The Dam Busters and a 1954 film, though the accuracy and ...
British Bouncing Bombs - Upkeep
... against German dams during the Operation Chastise, see Operation Chastise ... On the night of 16/17 May 1943, Operation Chastise attacked dams in Germany's Ruhr Valley, using Upkeep two dams were successfully breached, causing widespread flooding and damage, and significant loss of life ...