What is the name of the Secretary General of the UN who mediated between Britain and Argentina after the Falklands War and also negotiated for the independence of Namibia?

Javier Perez de Cuellar

Javier Perez de Cuellar(1982-1991) Peru; lawyer and diplomat; worked for peace in Cyprus, Afghanistan and El Salvador; mediated between Britain and Argentina after the Falklands War; negotiated for the independence of Namibia.