How were tanks effective?

Tanks were created by the British to move into the Non-man's land during World War I.

The "No-man's land" were the areas between the trenches, which were holes were the soldiers protected from bombs, were countries (in this case Germany and France) counterattacked each others. As none of them seamed to advance, new weapons were created.

First the Germans created the poisonous gas, which was somehow ineffective because the wind also returned the gas to their trenches, but oxygen masks were sonly created. Later on, the British found a way to go through the no-man's land without exposing their soldiers to dangerous situations. Certainly, the first tanks became a Excellent way of pushing back the Germans, but soon the enemy found a way to destroy them with artillery fire as they got stuck at the middle of the no-man's land.

These first tanks were at a time useful but also imperfect; they were invented under struggle circumstances in a very short time, with almost no time for testing. But undoubtedly, this tanks that combined artillery weapons with bullet-proof armor in a moving vehicle became the initiative movement for other countries to create and redesign new tanks which have continued their modernizations until today.