Will future battles be waged by tanks or terrorists?
Has Britain got armed forces built for the last war or the next?
Wrapping up the themes explored in the previous four articles of the Defence in Depth series, the Telegraph’s Defence and Security correspondent, Dominic Nicholls, looks to the future and asks whether the armed forces Britain is designing will be relevant to the fight they will likely be involved in.
Dominic will be joined by Sean McFate, a former US paratrooper turned Pentagon adviser, on Friday November 29 from 9.30am (GMT) in the comments section of this article, to answer your questions and discuss the themes the Defence in Depth series has raised.
If war is really a question of what we care about, is it less about forecasting the world and more about forecasting ourselves?
You can either leave your questions in the comments section ahead of time or join us live at 9:30am (GMT).