If you were to kill someone what will it be for

Brutal question, but if I were to kill someone, it's probably because they generally are bad and are needed to be rid of...  I feel like I would be a police to actually kill someone rather than to kill them without reason... I'd like to make someone's life miserable rather than killing them directly imo. Like stealing their money, or selling their dog pfft-

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.