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Austria and Turkey did not use tanks. Germany built only twenty tanks, and they used captured British tanks which were in no short supply.
Because they were fighting a war!!!
They used shovels and picks to dig out the trenches.
The trenches on the western front were built in a more or less continuous line from the North Sea all the way to the border of Switzerland. A distance of about 750 km; considering that both sides used multiple trench lines, plush support trenches, and zigzags across the landscape there would have been several thousand kilometres of trenches being used by either side at any given time.
After the war the trenches went away as the land returned to its original uses, but I found a couple of them left that you can visit. One is Vieil Armand in Alsace, and the trenches were mostly carved in stone so they are well preserved. Also, World War 1 trenches in the Meuse have been restored to their original condition so that people can visit them. The German trenches there were built with concrete reinforcements, but the French trenches had filled in over the years and had to be dug out again.
the allies soon realized that they could not not break through this line, they also began to dig trenches.
To prtect the army from getting shot
Fight in the trenches and try to break a stalemate and overcome the Germans stranglehold. Eventually the Allies overcame the Germans once the Americans built up their force and more technological advances reached the troops.
by digging trenches and connecting the rivers
they built trenches for procetion and they used it as a base.
The trenches were called saps and the people who dug them were called sappers.
Trench warfare used several different types of trenches. Firing trenches were used by soldiers to protect themselves while firing their weapons at their enemy. Cover trenches were often built next to the firing trenches as a second line of defense in case the enemy captured the firing trench. Support trenches were used as rest areas for off-duty troops, who sometimes lived in dugouts excavated in the sides of the trench. A network of reserve and communications trenches was used to bring supplies and fresh troops to the front.
Austria and Turkey did not use tanks. Germany built only twenty tanks, and they used captured British tanks which were in no short supply.
Thessaloniki, or Salonika.
Because they were fighting a war!!!
They used shovels and picks to dig out the trenches.
Many things made it possible to fire from the trenches. Mortars and field artillery were often fired from trenches. Trenches usually had berms (low dirt walls) built in front of them with firing positions along the top of the berm. Trenches sometimes had benches or ladders for gunners and snipers.