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  2. American football positions - Wikipedia

    en.wikipedia.org/wiki/American_football_positions

    A diagram showing an I formation on offense and a 4-3 formation on defense In American football , the specific role that a player takes on the field is referred to as their "position". Under the modern rules of American football, both teams are allowed 11 players [ 1 ] on the field at one time and have "unlimited free substitutions", meaning ...

  3. Western Front tactics, 1917 - Wikipedia

    en.wikipedia.org/wiki/Western_Front_tactics,_1917

    At the front of the battle zone he chose the old third line from Méricourt to Oppy, then a new line along reverse slopes from Oppy to the Hindenburg Position at Moulin-sans-Souci, creating a battle zone 2,500 yd (1.4 mi; 2.3 km) deep. A rearward battle zone 3,000 yd (1.7 mi; 2.7 km) backed on to the Wotan line, which was nearing completion.

  4. 2023 Ukrainian counteroffensive - Wikipedia

    en.wikipedia.org/wiki/2023_Ukrainian...

    Between Verbove and Tokmak is the third, and final, line of defense consisting of scattered defensive strong points and thin localized minefields. [132] [133] On 23 September, the ISW assessed that Ukrainian forces had cleared out all Russian troops between Robotyne and Novoprokopivka, a settlement directly south of Robotyne.

  5. Association football tactics and skills - Wikipedia

    en.wikipedia.org/wiki/Association_football...

    In zone defence, second and third defenders and midfielders are organised in two lines, in the transversal direction of the field, constituting a defender line and a midfielder line, the midfield line working as a "second shield" of the defence. The lines should be fairly possible, though the first defender and in some cases the second defender ...

  6. Interior lines - Wikipedia

    en.wikipedia.org/wiki/Interior_lines

    Interior lines [a] (as opposed to exterior lines) is a military term, derived from the generic term line of operation or line of movement. [1] The term "interior lines" is commonly used to illustrate, describe, and analyze the various possible routes (lines) of logistics, supply, recon, approach, attack, evasion, maneuver, or retreat of armed forces.

  7. Fortifications of the Russian invasion of Ukraine - Wikipedia

    en.wikipedia.org/wiki/Fortifications_of_the...

    In the beginning of the war, large swaths of the Ukrainian defense line on the border with Russia were crossed. The front was engulfed in fast-paced maneuvering by both sides as part of the Kyiv Offensive and related efforts in the Northern Ukraine campaign, [3] until Russian advances stalled, and both sides started to dig in mid-2022. [4]

  8. 3–4 defense - Wikipedia

    en.wikipedia.org/wiki/3–4_defense

    The 3–4 defense was originally devised by Bud Wilkinson at the University of Oklahoma in the 1940s as the 5–2 Oklahoma defense. The first NFL team to regularly employ the 3–4 was the 1974 New England Patriots under Chuck Fairbanks , who employed the 5–2 for all but one of his six seasons (1967–72) as head coach of the Oklahoma Sooners ...

  9. Defense line - Wikipedia

    en.wikipedia.org/wiki/Defense_line

    A defense line or fortification line is a geographically recognizable line of troops and armament, fortified and set up to protect a high-value location or defend territory. A defense line may be based on natural difficult terrain features, such as rivers or marshes, mountain ranges, or coastlines; temporary field fortification works such as ...