The narrow straits in which the waterway connecting the Mediterranean with the Black Sea contracts, both to the north and to the south of the city, could be rendered impassable to hostile fleets approaching from either direction, while on the landward side the line of defence was so short that it could be strongly fortified, and held against large numbers by a comparatively small force.
Kuropatkin having already drawn in his line of defence on the south side towards Liao-Yang, the 2nd and 4th Japanese Armies delivered what was practically a blow in the air.
Thus it would appear that the citadel had an outer and an inner line of defence in prehistoric times.
Here another entrenched camp was made and from it the Moselle line (qv.) of forts darrit continues the barrier to Belfort (q.v.), another large entrenched camp, beyond which a series of fortifications at Montbliard and the Lomont range carries the line of defence to the Swiss border, which in turn is protected by works at Pontarlier and elsewhere.
Enghien had designed his battle even more carefully than before, but as the result of a series of accidents the two French armies attacked prematurely and straight to their front, one brigade after another, and though at one moment Enghien, sword in hand, broke the line of defence with his last intact reserve, a brilliant counterstroke, led by Mercy's brother Kaspar (who was killed), drove out the assailants.
The Danes had only three days' warning of the approaching danger; and the vast and dilapidated line of defence had at first but 2000 regular defenders.
After the first Confederate line of defence had been broken by the capture of Fort Henry and Fort Donelson (February 1862), Corinth was fortified by General P. G.
Johnston, established a line of defence west of the town.
Despite the comparative failure of the Composite Corps the attack had on the whole been a brilliant success, seven Allied divisions having defeated nine enemy divisions ensconced in immensely powerful works, capturing from them 5,300 prisoners and ioo guns and effecting such a wide breach in the last German line of defence that its complete capture in a few days was assured.
On this main line of defence some seven or eight permanent works had been disposed (it is difficult to define with accuracy, as some of the concreted works were little better than semi-permanent in character).