If we want to know what the next world war will look like, we need do no more than watch what is happening in Ukraine.
Just as the mass aerial bombings of the Second World War could be witnessed first in the Spanish civil war two years earlier, and the Boer war revealed the shortcomings in the organisation of the British Army that had to be rectified by the time of the Great War (when new ones arose), so now we can peer into the present to better prepare ourselves for a European conflict that is feeling inevitable.