Which operation resumed in 2018 to assist in the Mali conflict?

In 2018, Operation Newcombe was specifically resumed to provide support in the Mali conflict. This operation is part of the UK's broader commitment to peace and security in the region, responding to the complex challenges posed by ongoing instability and conflict in Mali. The operation aims to enhance the capabilities of UN peacekeeping forces and contribute to the stabilization efforts in the area.

The significance of Operation Newcombe lies in its focus on training and mentoring Malian forces, allowing them to better respond to threats from extremist groups and to maintain security in their own country. This highlights the importance of international cooperation in addressing not only immediate threats but also in building long-term national capacity.

While other operations like Shader (which pertains to counter-ISIS efforts in Iraq and Syria) are significant in their own right, they pertain to different geographic and strategic contexts. In this case, Operation Newcombe directly relates to the specific challenges and needs arising from the conflict in Mali, making it the correct answer.