Grom-class destroyer (1939)

With positive reviews of the operational service of the two British-built Grom-class destroyers, Grom and Błyskawica, the Navy decided to order two more ships of that type.

This time, however, the order was given (on 1 May 1939) to the recently expanded Polish Naval Yard (Stocznia Marynarki Wojennej) in Gdynia rather than to the British J. Samuel White shipyard in Cowes, responsible for the two previous ships.

[1][2] They would have been the first destroyer-class warships to be built in Poland (till then, the Polish shipyards have been building smaller ships, such as minelayers and minesweepers).

[3] The German invasion of Poland on 1 September 1939 interrupted the construction; some materials were diverted to the improvised armoured train "Kashubian Dragon".

The construction of the two destroyers, barely started, was never resumed, as the materials were scrapped or re-purposed by the occupier.