See that red blob off of SE South America on the Canada "British Empire" stamp?
This 1937 Argentinian 1p brown black & light blue "Map of South America" stamp would beg to differ...

Yes, the Falkland Island dispute....
When the British withdrew in 1774, they left behind a plaque asserting their continued claim. When Spain departed in 1806, they left a plaque in the name of Spain. When Argentina gained it's independence, it maintains it
inherited Spain's rights.
The dispute has been brewing and occasionally flaring into War(1982) for the past 200 years.
Edit: plaques and plagues are oh so similar.
