On foot and elephants
The alps.
Hannibal.
Taranth Shenoy (India)
How to cross river with elephants... was I guess the first major obstacle the Hannibal army faced...
In 1987, Arti Pradhan became the youngest female swimmer to swim the English Channel. I can't find any reference to her having swum across the Strait of Gibraltar.
Hannibal invaded Italy. He brought 32 elephants with him. The elephants were war elephants and were brought to use them to attack the Roman armies, not to cross the Alps, which was a difficult feat for these animals which were gigantic and from very hot climates. Most of his elephants (if not all of them) died while crossing the Alps in the snowy winter.
The Strait of Gibraltar is a 9 mile wide international waterway that connects the Mediterranean Sea with the Atlantic Ocean. It also separates Europe from Aftica. Thje Straits of Gibraltar is not claimed by any one country. Spain (and the British possession of Gibraltar) are on the north side of the straits and Morocco (And the Spanish possession of Cueta) is on the south side of the straits.
The general who I believe you are thinking of is Hannibal who did cross the Alps with elephants during the Punic wars. However he was Carthaginian not argentinian.
the Strait of Gibraltar
He traveled with several thousand horses and 37 war elephants.
Yes. You would either have to cross the Mediterranean Sea, the Strait of Gibraltar or the Atlantic Ocean. Iberia and Morocco do not touch.