Which war in 2001 is subjectively deemed a world war?
War on Terror The War on Terror (WoT), also known as the Global War on Terrorism (GWOT), is a metaphor of war referring to the international military campaign that was launched by the U.S. government after the September 11 attacks in the U.S. in 2001.  U.S. president George W. Bush first used the term ""war on terrorism"" on 16 September 2001, and then ""war on terror"" a few days later in a formal speech to Congress. In the latter speech, George Bush stated, "Our enemy is a radical network of terrorists and every government that supports them." The term was originally used with a particular focus on countries associated with al-Qaeda. The term was immediately criticised by such people as Richard B. Myers, chairman of the Joint Chiefs of Staff, and more nuanced ones subsequently came to be used by the Bush administration to publicly define the international campaign led by the U.S.; it was never used as a formal designation of U.S. operations in internal government documentation.
List of battles by casualties The following is a list of the casualties count in battles in world history. The list includes both sieges (not technically battles but usually yielding similar combat-related deaths) and civilian casualties during the battles. Large battle casualty counts are almost impossible to calculate precisely. Many of these figures are estimates, and, where possible, a range of estimates is presented. Figures display numbers of all types of casualties when available (killed, wounded, missing, and sick) but may only include number killed. Where possible, the list specifies whether or not prisoners are included in the count. This list does not include bombing runs (such as the attack on Pearl Harbor and the bombing of Tokyo) or massacres such as the Rape of Nanking, which, despite potentially massive casualties, are not typically classified as "battles", since they are usually one-sided engagements or the nation attacked upon is not officially at war with the attackers. Tactical or strategic strikes, however, may form part of larger engagements which are themselves battles.