What is Campaign ?
Campaign is (noun) 1. an organised military attack Napoleon’s Russian campaign of 1812 2. an organised attempt to achieve something A publicity campaign or an advertising campaign. He’s organising a campaign against the new motorway. The government’s anti-smoking campaign isn’t working.(verb) 1. to take part in a war The ladies stayed at home while the knights were away campaigning against the French. 2. to work in an organised way to achieve something campaigning for the banning of landmines to campaign against nuclear reactors
source: Easier English, Student Dictionary Upper Intermediate Level