Frontier Wire (Libya) in the context of "Sallum"

The Italian invasion of Egypt (Operazione E) was an offensive in the Second World War from Italian Libya, against British, Commonwealth and Free French in the neutral Kingdom of Egypt. The invasion by the Italian 10th Army (10ª Armata) ended border skirmishing on the frontier and began the Western Desert Campaign (1940–1943) proper. The Italian strategy was to advance from Libya along the Egyptian coast to seize the Suez Canal. After numerous delays, the scope of the offensive was reduced to an advance as far as Sidi Barrani and the defeat of any British forces in the area.

The 10th Army advanced about 65 mi (105 km) into Egypt against British screening forces of the 7th Support Group (7th Armoured Division) the main force remaining in the vicinity of Mersa Matruh, the principal British base in the Western Desert. On 16 September 1940, the 10th Army halted and took up defensive positions around the port of Sidi Barrani. British casualties were 40 men killed and the Italians suffered 120. The army was to wait in fortified camps, until engineers had built the Via della Vittoria (Victory Road) along the coast, an extension of the Libyan Via Balbia. The Italians began to accumulate supplies for an advance against the 7th Armoured Division and the 4th Indian Division at Mersa Matruh, about 80 mi (130 km) further on.

Fort Capuzzo (Italian: Ridotta Capuzzo) was a fort in the colony of Italian Libya, near the Libya–Egypt border, next to the Italian Frontier Wire. The Litoranea Balbo (Via Balbo) ran south from Bardia to Fort Capuzzo, 8 mi (13 km) inland, west of Sollum, then east across the Egyptian frontier to the port over the coastal escarpment. The fort was built during the Italian colonial repression of Senussi resistance in the Second Italo-Senussi War (1923–1931), as part of a barrier on the Libya–Egypt and Libya–Sudan borders.

The Frontier Wire and a line of forts including Fort Capuzzo were used to stop the Senussi from moving freely across the border. The fort had four crenellated walls enclosing a yard. Living quarters had been built around the edges and provided the base for border guards and Italian army armoured car patrols. A track ran south from the fort, just west of the frontier wire and the border, to Sidi Omar, Fort Maddalena and Giarabub. The fort changed hands several times during the Western Desert campaign (1940–1943) of the Second World War.