George Islay MacNeill Robertson, Baron Robertson of Port Ellen KT, GCMG, PC, FRSA, FRSE , is a British politician of the Labour Party who served as the 10th Secretary General of NATO from 1999 to 2004; he succeeded Javier Solana. He served as Secretary of State for Defence from 1997 to 1999, before becoming a life peer as Baron Robertson of Port Ellen, of Islay in Argyll and Bute.