Is World War 2 considered a political assassination?
Well, kinda. Depending on who you ask. It really hurt the government politics of the dictator-run countries because of their powermad ambitions. So, there yes. Much of the other world, no.
The official cause of World War 1 is usually listed as the assassination of Archduke Franz Ferdinand. He and his wife Sophie were fatally shot by Gavrilo Princip (a previous assassination attempt involved the throwing of a bomb, which is not technically a gun shot), and these shots may be considered those which started the War.
As the primary cause of World War I, the assassination of Archduke Ferdinand was perpetrated by Yugoslavian patriots (supported by Serbia) intent on breaking off portions of the Austro-Hungarian Empire that they believed deserved independence. Through this violence, they sought to gain political weight by which to force the Empire to make concessions to them.
The incident that triggered the beginning of World War 1 was the assassination of the heir to the throne of?
Prior to and following the outbreak of the First World War, the Balkans were considered to be the "powder keg of Europe." This is due to the overlapping alliances of the strongest nations and the volatility in that particular region. One significant action could, and, with the assassination of Archduke Franz Ferdinand, did, ignite a world war.