Trench warfare is used from ancient times. It is a series of ditches that were dug on the ground which would enable the soldiers to hide and attack the enemy.
Explanation:
The parapets or the fronts of the trenches were dug ten feet deep and usually sandbags were kept outlining the trenches so that it provides a better place to position the snipers and attack the enemy. Periscopes and mirrors were also placed to continuously observe every little move of the enemy. These trench warfare is the defensive strategy wherein trenches may run across many miles.
The western front in France is fought using the trench warfare. The space between the two opposing trenches were called to be no man' land as none would appear there due to fear of attack. Many drawbacks in this warfare Technic as it would get flooded during heavy rains. Trenches were dirty and unhygienic giving rise to infectious diseases. It were muddy and uncomfortable paving way to many dangerous health hazard during world war I.
Christopher Columbus Saw Land! Early in the morning on October 12, 1492, a sailor looked out to the horizon from the bow of his sailing ship, the Pinta, and saw land. After 10 long weeks at sea, from the port of Palos, Spain, Columbus and his crews saw the New World.
The three events were:
Columbus found or landed in the Bahamas (12 Dec 1492) and in the islands of the Caribbean
Columbus sailed the ocean blue.
Answer:
Irrigation systems helped to provide a stable food supply by watering crops and keeping them healthy. Without irrigation systems, the plants would be dead and dry.
