The Channel Tunnel is one of the great engineering projects of the 20th Century. It is not, and does not pretend to be a history of the Channel Tunnel, nor a discussion on rolling stock technicalities. UK MOD © Crown copyrightIn a 1989 MOD paper called “Peacetime military use of the Channel Tunnel” the MOD explored the potential offered by the tunnel and what it could do to save costs and support the UK presence in Germany. UK MOD © Crown copyrightThe key area where the tunnel offered opportunities for the MOD was in the movement of cargo. These documents provide a fascinating rare glimpse into MOD thinking for the Channel Tunnel.