 Complete the following phrase:  To reach Calais, the English army must cross the River Somme, but the far larger French army blocks the fords. The two opposing armies meet at Azincourt, on the day of Ss. Crispin and Crispinian. Torrential rain soaks the newly ploughed land, turning it into a treacherous morass, especially for the French knights in full plate armour. Natural obstacles on both sides of the battlefield narrow down towards the English. As at 