But on the descent of the emperor Henry VII., Frederick entered into an alliance with him, and in violation of the pact of Caltabellotta made war on the Angevins again (1313) and captured Reggio.
In 1307 the city became a lordship for Giberto da Correggio, who laid the basis of its territorial power by conquering Reggio, Brescello and Gaustalla, and was made commander-in-chief of the Guelphs by Robert of Apulia.
A similar mass, separated from the preceding by a low neck of Tertiary hills, fills up the whole of the peninsular extremity of Italy from Squillace to Reggio.
In Sicily and the provinces of Reggio, Catanzaro, Cosenza and Lecce this tree flourishes without shelter; as far north as Rome, Aquila and Teramo it reqtiires only the slightest protection; in the rest of the peninsula itruns the risk of damage by frost every ten years or so.
The proportion of ground under olives is from 20 to 36% at Porto Maurizio, and in Reggio, Lecce, Ban, Chieti and Leghorn it averages from 10 to 19%.