HMS Onslow (1916) 15 February 1916 and completed in April 1916. Her first commander was John Tovey, (later Admiral of the Fleet). On 24 April 1916, the Easter Rising against British rule broke out in Ireland. As a response, two Infantry Brigades were ordered from Liverpool to Dublin to reinforce the British forces, with "Onslow" escorting the transports carrying these troops. She saw action at the Battle of Jutland, where "Onslow" was badly damaged, with her speed reduced to . Nevertheless, Tovey pressed home the attack against first a cruiser and then a line of battlecruisers. "Onslow" was brought back to Aberdeen despite
Karl Radek Left, with which he had close links from his time in Germany, introducing him to Paul Levi at this time. He took part in the Zimmerwald Conference in 1915, siding with the left. During World War One, Radek engaged in polemics with Vladimir Lenin over the subject of the Irish Easter Rising of 1916; while Lenin was strongly enthusiastic about the Rising, seeing it as a blow to English imperialism, Radek disagreed. Basing his view on Theodore Rothstein (a Jewish emigre from the Russian Empire, living in London), he claimed that, what he called the "Sinn Féin movement" was petit-bourgeois