Tarshish -- appears to refer to Britain
2Chronicles 9:21 For the king's ships went to Tarshish with the servants of Huram: every three years once came the ships of Tarshish bringing gold, and silver, ivory, and apes, and peacocks.
More than 12 times the Bible refers to the ships of Tarshish or going to Tarshish by ship.
Psalm 48:7 Thou breakest the ships of Tarshish with an east wind.
In Psalm 48 we see Israel restored to the Jews and they are walking about Zion in praise having returned after WWII. Prior to WW1 and the Balfour declaration Israel was under the control of Turkey. But after 1917 Britain took control and after WWII their hold on Israel was broken. Britain more than any other nation is known for its navy and that grip on power from its navy was broken by an east wind, from Germany, Russia and Japan. Therefore, it is quite reasonable to think that Tarshish refers to Britain. Yes, the US also has a great Navy, but it wasn't broken so that Israel could become a nation and the kings of Israel in the OT were not sailing to the US to bring all these riches to Israel talked about in 2Chronicles 9:21
Psalm 72:10 The kings of Tarshish and of the isles shall bring presents: the kings of Sheba and Seba shall offer gifts.
Tarshish is referred to as "the isles" just as Britain is referred to as the "British isles".
Isaiah 23:6 Pass ye over to Tarshish; howl, ye inhabitants of the isle.
Once again referred to as an isle.
Isaiah 66:19 And I will set a sign among them, and I will send those that escape of them unto the nations, to Tarshish, Pul, and Lud, that draw the bow, to Tubal, and Javan, to the isles afar off, that have not heard my fame, neither have seen my glory; and they shall declare my glory among the Gentiles.
Britain was one of the major countries that sent out evangelists to evangelize the entire world.
Ezekiel 27:12 Tarshish was thy merchant by reason of the multitude of all kind of riches; with silver, iron, tin, and lead, they traded in thy fairs.
It is also described as a merchant nation and very rich. Certainly applicable to the British empire.
Ezekiel 27:25 The ships of Tarshish did sing of thee in thy market: and thou wast replenished, and made very glorious in the midst of the seas.
A reference to a nation with a glorious navy.
Ezekiel 38:13 Sheba, and Dedan, and the merchants of Tarshish, with all the young lions thereof, shall say unto thee, Art thou come to take a spoil? hast thou gathered thy company to take a prey? to carry away silver and gold, to take away cattle and goods, to take a great spoil?
Britain is often referred to as a young lion. The lion (red on yellow background) is the symbol of Scotland. Three lions are the symbol for England.
Jonah 1:3 But Jonah rose up to flee unto Tarshish from the presence of the Lord, and went down to Joppa; and he found a ship going to Tarshish: so he paid the fare thereof, and went down into it, to go with them unto Tarshish from the presence of the Lord.
This shows that Tarshish is to the west of Israel