The term used to describe the willingness of britain and france to allow hitler to repeatly break provisions of the treaty of versailles is

The term: appeasement

The policy of appeasement was signed by the prime ministers of Britain and France with Hitler in Munich in September, 1938.  They had given in to Germany's annexation of the Sudentland as a German territory, including the evacuation of any Czech population from the region.  After signing the Munich Pact, Hitler took control of all of Czechoslovakia (in March, 1939).  Britain and France still did not pursue war with Germany when that happened. But when Germany invaded Poland in September, 1939, it was beyond clear that appeasing Hitler hadn't worked, and war was pursued.

it would have to be gasioline

the berlin blockade was an international crisis that arose from an attempt by the soviet union, in 1948–49, to force the western allied powers (the united states, the united kingdom, and france) to abandon their post-world war ii jurisdictions in west berlin. in march 1948 the allied powers decided to unite their different occupation zones of germany into a single economic unit. in protest, the soviet representative withdrew from the allied control council. coincident with the introduction of a new deutsche mark in west berlin (as throughout west germany), which the soviets regarded as a violation of agreements with the allies, the soviet occupation forces in eastern germany began a blockade of all rail, road, and water communications between berlin and the west. on june 24 the soviets announced that the four-power administration of berlin had ceased and that the allies no longer had any rights there.