28.06.1914
Archduke Franz  Ferdinand  of Austria was killed together with his wife in Sarajevo.
Murder served as occasion for the beginning of the First World War.

22.06.1941
Fascist Germany attacked the Soviet Union, the beginning of the Great Patriotic War.
Human victims - 26.6 ml. (The Soviet Union), in Estonia - 51 000.

07.12.1941
The attack on Pearl Harbor (Hawaii) by the Empire of Japan
The death toll: Americans - 2350, Japanese - 55; injured (Americans) - 1178
9 ships were sunk and 21 severely damaged, 188 planes were lost, Japanese lost 29 planes  

04.11.1956
Soviet tanks entered Budapest for the suppression of Hungarian revolution.
Human victims: Hungarian population - 2500, Russian soldiers - 700.

04.11.1979
Seizure of US Embassy in Tehran by  Islamist students.
All hostages (65 people, including 53 Americans) were released after 444 days.

02.05.1982
Off the Falkland Islands (Argentina)
The Argentine cruiser ARA General Belgrano was sunk by the British
Argentine losses: 323 sailors; during last 28 years 460 (640 unofficially) veterans committed suicide

28.02.1993
Waco siege (Branch Davidian ranch, Texas)
First assault by ATF, then after 51 days the second attempt by the FBI.
Fatalities: 76 people (including children - 21)

13.07.2009
Kunar province, Afghanistan
Killed: 9 U.S. soldiers and 15 NATO troops

25.10.2009
Explosion in Baghdad
Human victims - 155, injured - 500

31.10.2010 
Our Lady of Salvation Church in Bagdad
52 hostages were killed, 67 wounded (most of them were Iraqi Christian worshippers)

11.03.12
USA staff Sgt. Robert Bales
Killed 15 Afghan villagers