It seemed that every time we went past a Islas Malvinas memorial (and there are thousands in and around Argentina) there was always some parade on at the same time. Not a time to advertise being British.
On the main road from Argentina to Chile, on the mountain beside the summit tunnel there is a huge daubed sign saying "Las Islas Malivinas son Argentinas". Nice little reminder just as you leave the country
Which crossing was that? We went across between Chile and Argentina at:-
Villa La Angostura to Osorno (and down to Puerto Montt).
San Sebastian (into Argentina down to Ushuaia, back up to San Sebastian and back into Chile).
Santiago / Los Andes -> Mendoza
I'm guessing it was the Santiago/Mendoza one. I saw a cyclist climbing up the switchbacks up from the Santiago side, I was jealous as it would have been a fantastic descent down into Mendoza.