See List of Egypt castles, forts, fortifications and city walls. There are several different architectural styles for castles, towers, fortifications and churches. Negotiations to end the siege of Leith and demolish new fortifications at Dunbar Castle continued. Its Type 10 bunkers were more strongly constructed than the earlier border fortifications. Both sides responded by building new castles, sometimes creating systems of strategic fortifications. Fortifications and other defensive structures were built. The troops dug many of the fortifications and trenches with hand shovels. Each was placed in charge of one of the 72 bastions of the Madurai fortifications. Debate continues over the usefulness of the Redoubt and other Swiss fortifications. He strengthened the Portuguese fortifications of Fort Manuel on Cochin. The turrets were subsequently issued for use in fortifications. Organisational reforms were accompanied by innovations in cannons, fortifications, and the use of elephants. The new fortifications included increased firepower and improved weaponry. More importantly he suggested a wholly medieval date for the walled fortifications and temple. The air force will contribute by mass bombardment of the fortifications and cities.