The Corinth rail disaster occurred on 30 September 1968 when two passenger trains carrying people returning to Athens after voting in their home towns in the constitutional referendum of 1968, which had been held the previous day,[9] collided near Derveni, Corinth, killing 34 people and injuring 150.

[10] The military junta, presided over by Colonel Georgios Papadopoulos had organized a mock referendum for the approval of a new Constitution and all of Greece had gone to the polls.

[11] On the afternoon of Monday 30 September[12] two passenger trains one and a half hours apart left Kyparissia in Messinia bound for Athens and Piraeus.

In the carriages of both train there were almost 2,500 passengers[13] citizens, returning from voting in the referendum on the Constitution of Greece, which had been carried out by the Junta.

Train "304" after parking at the station of Derveni and picking up passengers, continued its route, but stopped a few meters below.

The "Peloponnisos" newspaper wrote (at the time) the railway employees had caught the conversation and one train, 306, was moving at a speed of more than 50 kilometers.