Philleas Fogg
The Americans got as little warning as we had.
The French ACTIVELY stalled on deliveries of AM39 (Air-Launched Exocets) to customer nations indicating overt support for Argentina (Peru for example) or those suspected of 'ordering on Argentina's behalf' & offering covert supply & support (a certain Middle Eastern regime, fortunately no longer with us for example).
Their supply of AM39's was woefully short & with no replacements on the horizon from the manufacturer or obtainable by proxy improvised solutions were sought. Hence the improvisation that elements of 2 PARA stumbled across on the streets in Port Stanley.