(A) zeppelins
(B) trench warfare
(C) no man’s land
(D) ** dog fights
EXPLANATIONS BELOW
Concept note-1: -A dogfight, or dog fight, is an aerial battle between fighter aircraft conducted at close range. Modern terminology for air-to-air combat is air combat manoeuvring (ACM), which refers to tactical situations requiring the use of individual basic fighter maneuvers (BFM) to attack or evade one or more opponents.
Concept note-2: -air warfare, also called aerial warfare, the tactics of military operations conducted by airplanes, helicopters, or other manned craft that are propelled aloft. Air warfare may be conducted against other aircraft, against targets on the ground, and against targets on the water or beneath it.
Concept note-3: -Etymology. The term dogfight has been used for centuries to describe a melee; a fierce battle between two or more opponents. The term gained popularity during World War II, although its origin in air combat can be traced to the latter years of World War I.
Concept note-4: -A dogfight is an aerial battle between fighter aircraft conducted at close range. The aircraft orbit each other and quickly maneuver in the air while looking for weak points. The last time an enemy aircraft was shot down in a dogfight was about four decades ago.
Concept note-5: -Dog fighting, which is appropriately called a blood-sport, is the actual pitting of two dogs against each other in a pit or a ring to fight for the entertainment of the spectators.