Final answer:
The Berlin Airlift supplied thousands of tons of essentials to West Berlin when the Soviets blocked land routes, highlighting the resolve and capability of the allied forces, leading to the end of the blockade in 1949.
Step-by-step explanation:
The event that provided thousands of tons of supplies to the city cut off by the Soviets was the Berlin Airlift. This was a significant operation carried out by the United States and the United Kingdom from June 1948 to May 1949, in response to the Soviet blockade of all land routes into West Berlin. With the efforts of US planes landing every three minutes and over 1,000 flights daily, approximately 2.5 million tons of fuel and essential supplies reached the citizens of West Berlin. The steadfast commitment of the allies to airlift supplies demonstrated their strong resolve and capability, eventually leading to the lifting of the blockade by the Soviets in May 1949.