Hasanlu was crowned by a high citadel surrounded by a strong fortification wall.
The southern and western sides were protected by a strong fortification system.
In 1740 a British siege of St. Augustine convinced the Spanish that a stronger fortification was needed, and the fort, built of coquina (shell stone), was begun; it was finished in 1742.
Forces attacking a castle of other strong fortification sometimes sought to undermine the foundations by digging "mines" or tunnels underneath them.
After spending the rest of 1780 recruiting Loyalists for a new regiment called the American Legion, Arnold was sent with 1,600 men in late December by General Sir Henry Clinton to Virginia, with instructions to raid Richmond and then establish a strong fortification at Portsmouth.
It flourished in early Muslim times (7th century), serving as a base for Islamization, and was surrounded by strong fortifications by Hārūn al-Rashīd.
The government must at least be taking to heart the next lesson: that it needs to build higher and stronger fortifications for its websites.For the dissidents and their sympathisers, it remains unclear whether this kind of hacking actually helps.
Milosevic's friends in the army command moved him to yet another base, Krcmar near Valjevo, which had stronger fortifications and underground bunkers, but from then on they were in retreat as the Djindjic government asserted its authority over the security apparatus.
But the reports were correct: despite the strength of his defenses on the Peninsula, Confederate commander Joe Johnston wanted to rely on Richmond's stronger fortifications, stretch Union supply lines, and mire the Union Army in the Chickahominy swamps between the peninsula and the capital.
