What is the fine-grained topic of the following text: Regiment), who wrote from on board the ‘Hunts Green’ (a captured German ship being used to evacuate his men) following the evacuation from the Anzac and Suvla bridgeheads, which took place on 18th/19th December. Only return the topic.
Evacuation from the Anzac and Suvla bridgeheads on the 'Hunts Green'