Industry forecasters predicted the album was on course to debut on the
Billboard 200 with first week sales of around 60,000 units. It went on to debut at number nine on the chart, selling 78,715 copies on its first week. It would spend a total of 27 weeks on the chart, and was certified gold by the
Recording Industry Association of America in October 2005 for shipments in excess of 500,000 units. As of November 2010,
Lest We Forget had sold over a million copies in the United States. It also debuted at number three on the
Canadian Albums Chart. The album was successful internationally as well, particularly in Europe, where it debuted at number five on
Billboards
European Top 100 Albums after peaking within the top 10 of national
record charts in Austria, Germany, Spain, Sweden, Switzerland and the United Kingdom. It also peaked at number two on the Compilation Albums Chart in France, and was certified gold by the
Syndicat National de l'Édition Phonographique (SNEP) for shipments in excess of 100,000 units there. In 2017,
IFPI Denmark awarded the record a platinum certification for shipments of over 20,000 units. The set originally peaked at number 20 on Denmark's
Hitlisten. Similarly,
Lest We Forget received a platinum award from the
British Phonographic Industry (BPI) in 2017 for shipments in excess of 300,000 copies there. The album peaked at number four on the
UK Albums Chart upon release, and peaked also at the same position on the
German Albums Chart, where it was certified gold by the
Bundesverband Musikindustrie (BVMI) for shipments of over 100,000 units. The album peaked at number 15 in both Australia and Japan, and debuted at number nine in New Zealand. It was certified gold by the
Australian Recording Industry Association (ARIA) for shipments of over 35,000 copies in that country. It also peaked within the top 20 of the national charts in Belgium, Greece, Italy, Norway, Portugal, and Scotland. ==Track listing==