 The division trained to repel seaborne invasions from German forces, as well as airborne landings and small raids.The beaches of County Antrim and Londonderry were seen as the most likely areas for an invasion, and by the end of autumn, concrete pillars, barbed wire entanglements, and camouflaged firing positions had been constructed.During the division's stay in Northern Ireland, Lieutenant-General Henry Pownall took command of British forces in the country.