Role of Obstacles
Obstacles are used in combat operations to create choke points, deny mobility corridors and avenue of approach to positions, to enhance field of fire for direct fire weapons, or to protect key tactical terrain features to the enemy.
Read more about this topic: Obstacles To Troop Movement
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—Anonymous Stepparent. Making It as a Stepparent, by Claire Berman, introduction (1980, repr. 1986)
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—Friedrich Nietzsche (1844–1900)