The article only summarizes it shortly, but the parallels to the Munich Agreement from 1938 are really scary.
Hitler's aim was to take over all of Czechoslovakia by breaking it apart. The subject of the Munich Agreement was the Sudetenland, the region bordering Germany. Before there were some votes and local political forces expressing the wish of the German minority in the Sudetenland to create an independent state (See the parallels with DNR, LNR and Crimea). This was used by Hitler to justify taking over the region. Suddenly it wasn't about independence anymore, but about inclusion into Germany.
The Czechoslovakian government in Prague obviously hated the idea, but they were not invited to the talks in Munich. Only afterwards were they made aware of the decision that would be imposed on their nation. Who was invited was fellow fascist Mussolini from Italy, as well as France and UK, who gave in and signed this agreement, giving international support to Germany just taking over parts of neighboring nations.
Their reasoning was, if they were to disagree, Hitler would assert his will by force and take Czechoslovakia militarily, starting a large European war (that is also the reason Prague was forced to accept the decision: the alternative was a war they could never win, they could not count on any outside help). This was the so-called appeasement policy by the UK. They bought "peace" in exchange for territories they didn't own but felt the right to decide over. We all know how this heavily-priced peace turned out. At most it gave the allied forces one more year to prepare for WWII.
