彩虹行动

cǎi hóng xíng dòng

the two mass scuttling operations carried out by the German navy: the scuttling of the German fleet at Scapa Flow in 1919 and Operation Regenbogen, the scuttling of U-boats in 1945

彩

cǎi

(bright) color

虹

hóng

rainbow

行

xíng

(bound form) to walk; to go; to travel

动

dòng

(of sth) to move