UK forces have been in Afghanistan since US-led forces launched Operation Enduring Freedom in 2001, targeting al-Qaeda and its Taliban supporters. As the UK's role has changed, troop numbers have increased.
Definition of systematic. 1 : relating to or consisting of a system. 2 : presented or formulated as a coherent body of ideas or principles systematic thought. 3a : methodical in procedure or plan a systematic approach a systematic scholarb : marked by thoroughness and regularity systematic efforts.
1 Systematics : The study of the identification, taxonomy and nomenclature of organisms, including the classification of living things with regard to their natural relationships and the study of variation and the evolution of taxa.