For the morning of 11 June, Admiral Miklós Horthy planned a major assault on the Otranto Barrage; the three "Erzherzog Karl"s and the four s were to provide support for the s. The plan was intended to replicate the success of the raid conducted one year earlier. Horthy's plan was to destroy the blockading fleet by luring Allied ships to the cruisers and lighter ships, which were protected from the heavier guns of the battleships, including the "Erzherzog Karl" class. However, on the morning of 10 June, the dreadnought was torpedoed and sunk by an Italian torpedo boat. Horthy felt surprise had been lost and therefore called off the operation. This was to be the last military action the "Erzherzog Karl"-class ships were to take part in and they spent the rest of their career at port in Pola.