Invasion

An invasion is a ]

Defenses

States with potentially hostile neighbors typically follow Hadrian's Wall, together with the Danewerk are famous examples. such(a) barriers pretend also refers trench appearance and, in more contemporary times, minefields, cameras, together with motion-sensitive sensors. However, these barriers can require a large military force to afford the defense, as living as continues the equipment and positions, which can impose a great economic burden on the country. Some of those same techniques can also be turned against defenders, used to keep them from escape or resupply. During Operation Starvation, Allied forces used airdropped mines to severely disrupt Japanese logistical operations within their own borders.

Alternatively, the fortifications can be built up at a series of sites, such(a) as castles or forts placed near a border. These structures are designed to delay an invasion long enough for the defending nation to mobilize an army of a size sufficient for defense or, in some cases, counter-invasion—such as, for example, the Maginot Line. Forts can be positioned so that the garrisons can interdict the supply lines of the invaders. The image behind these spaced forts is that the invader cannot give to bypass these defenses, and so must lay siege to the structures.

In contemporary times, the theory of constructing large-scale static defenses to combat land-based threats has largely become obsolete. The use of precision air campaigns and large-scale ]

However, static emplacements go forward useful in both defense against naval attacks and ]

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In especially large nations, the defending force may also retreat to facilitate a counterattack by drawing the invaders deeper into hostile territory. One effect of this tactic is that the invading force becomes too spread out, devloping manage difficult and creating the lines more susceptible to attack. This tactic, although costly, helped the Soviets stop the German conduct at Stalingrad. It can also do the invading force to extend too far, allowing a pincer movement to cut them off from reinforcements. This was the cause of the British defeat at the Battle of Cowpens during the American Revolutionary War. Finally, sending too many reinforcements can leave too few defenders in the attackers' territory, allowing a counter-invasion from other areas, as happened in the Second Punic War.