gets started with WWI British in 15mm.
The New Gate was built in 1887, to provide access to new neighborhoods growing outside the city walls.
The gate is near the northwestern corner of the city, and is on a hill that slopes down towards Damascus Gate in the east, and Jaffa Gate in the south.
The gate allows automobiles to enter the old city.
This gate was breached in 1948, by 15 July 1948, 0300-0545.
Fifty Sternists attacked the old city wall, near the northwestern corner, and 50 Irgunists attacked the New Gate from Notre Dame with two large bombs to blow the wall, and explosives to destroy buildings in the city to facilitate moving between buildings. Artillery support was to be provided.
The large bombs failed to breach the wall. The attack on the New Gate was successful, and the Irgunists entered the old city.
However, the order to retreat was given, due to problems between the three military commands in Jerusalem - the Irgun and Stern groups were under the Haganah (Israeli army) but they still acted independently, and did not get along with the Israeli commander.
Other possible scenarios could involve attacks by enemies of the Ottoman Turks, from 1540 on. For a more modern possibility, consider Napoleon. Britain could also have attacked the city in 1917/18.