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  2. Line (formation) - Wikipedia

    en.wikipedia.org/wiki/Line_(formation)

    The line formation was very successfully first used with combined arms in the Thirty Years War by the Swedish king Gustavus Adolphus the Great, at the Battle of Breitenfeld. [2] An infantry battalion would form "in line" by placing troops in several ranks, ranging in number from two to five, with three ranks being the most common arrangement ...

  3. Walls of Constantinople - Wikipedia

    en.wikipedia.org/wiki/Walls_of_Constantinople

    The moat was situated at a distance of about 20 m from the outer wall. The moat itself was over 20 m wide and as much as 10 m deep, featuring a 1.5 m tall crenellated wall on the inner side, serving as a first line of defence. [45] [49] Transverse walls cross the moat, tapering towards the top so as not to be used as bridges. Some of them have ...

  4. Western Front tactics, 1917 - Wikipedia

    en.wikipedia.org/wiki/Western_Front_tactics,_1917

    With artillery reinforcements arriving, the first line of defence was to be a heavy barrage (Vernichtungsfeuer) on the British front line, at the commencement of a British attack, followed by direct and indirect machine-gun fire on the British infantry, as they tried to advance through the German battle zone, followed by infantry counter ...

  5. Outpost (military) - Wikipedia

    en.wikipedia.org/wiki/Outpost_(military)

    A military outpost is detachment of troops stationed at a distance from the main force or formation, usually at a station in a remote or sparsely populated location, positioned to stand guard against unauthorized intrusions and surprise attacks, serving as the first line of defense.

  6. Defensive wall - Wikipedia

    en.wikipedia.org/wiki/Defensive_wall

    A defensive wall is a fortification usually used to protect a city, town or other settlement from potential aggressors. The walls can range from simple palisades or earthworks to extensive military fortifications such as curtain walls with towers, bastions and gates for access to the city. [1]

  7. Defensive fighting position - Wikipedia

    en.wikipedia.org/wiki/Defensive_fighting_position

    The Salpa Line served Finland fighting against the Soviet Union during the Continuation War. Photo taken in Luumäki, Finland, in 2011. Tobruk type positions are named after the system of defensive positions constructed, initially, by the Italian Army at Tobruk, Libya.

  8. Lines of Torres Vedras - Wikipedia

    en.wikipedia.org/wiki/Lines_of_Torres_Vedras

    The Lines of Torres Vedras were lines of forts and other military defences built in secrecy to defend Lisbon during the Peninsular War.Named after the nearby town of Torres Vedras, they were ordered by Arthur Wellesley, Viscount Wellington, constructed by Colonel Richard Fletcher and his Portuguese workers between November 1809 and September 1810, and used to stop Marshal Masséna's 1810 ...

  9. Formation (American football) - Wikipedia

    en.wikipedia.org/wiki/Formation_(American_football)

    The offense is required to set up a formation before a play, subject to several rules: The formation must have at least 7 players on the line of scrimmage. [1] The 7 players are not required to be next to each other and may spread out across the width of the field, but this is rare; most offenses place at least 5 players together in a continuous line.