Judea, First Revolt
Date: c70 AD
Obverse: Countermarks Pig & Galley
The First Revolt in Judean took place from around 68 - 72 AD. This is a coin countermarked by the Tenth Legion. The Tenth Legion took part in the direct assault on Jerusalem that included the destruction of the Temple.
The Legions would use local coins for payment and put their own countermark on the coin. Most of these coins that are found today are so worn that you cannot tell what type the original coin was.
Each legion used a symbol of Rome, namely an Eagle, and a symbol of their particular Legion. In this case the "pig" was a symbol of the Tenth Legion. This Legion also used another symbol of a "galley" on this coin.
I have been only able to find Legion countermarks on Bronze coins and do not knew why this was the case. Why the coin needed to be countermarked is not known.