What pre-dreadnoughts did in the First World War

What did pre-dreadnoughts actually do during the First World War?

They handled secondary-theatre combat, port defence, convoy protection, transport, and other duties that did not require a modern battle line.

Pre-dreadnoughts were no longer suitable for the main fleet, but their heavy guns and armor still deterred cruisers and surface raiders. They appeared in the Mediterranean and Dardanelles, guarded distant ports in ones and twos, and escorted valuable movements. Some also transported personnel or important cargo and were considered for still more specialized roles. Their employment shows how a ship can be tactically obsolete in one setting while remaining valuable where the enemy cannot bring a modern battle fleet.