History's Bloodiest Siege: Standing Up Against Islamic Terrorists in 1565

James Jackson has a fascinating recount of the Siege of Malta in The Mail:

A hot and fetid June night on the small Mediterranean island of Malta, and a Christian sentry patrolling at the foot of a fort on the Grand Harbour had spotted something drifting in the water.
The alarm was raised. More of these strange objects drifted into view, and men waded into the shallows to drag them to the shore. What they found horrified even these battle-weary veterans: wooden crosses pushed out by the enemy to float in the harbour, and crucified on each was the headless body of a Christian knight.

This was psychological warfare at its most brutal, a message sent by the Turkish Muslim commander whose invading army had just vanquished the small outpost of Fort St Elmo - a thousand yards distant across the water.
Now the target was the one remaining fort on the harbour front where the beleaguered, outnumbered and overwhelmed Christians were still holding out: the Fort St Angelo. The Turkish commander wished its defenders to know that they would be next, that a horrible death was the only outcome of continued resistance.
But the commander had not counted on the mettle of his enemy - the Knights of St John. Nor on the determination of their leader Grand Master Jean Parisot de la Valette, who vowed that the fort would not be taken while one last Christian lived in Malta.

And the author makes an excellent point:

Malta was no mere siege. It teaches us many things: the need for courage and steadfastness by an entire populace in the face of threat; the fragility of peace; and the destructiveness of religious hate.