What does the uniform button of the Royal Eniskilling fusileers have on it as a motif?

The uniform button of the Royal Eniskilling Fusiliers features a motif of a castle, which symbolizes strength and fortification, along with the regiment's name and the date of its establishment. This design reflects the regiment's proud history and connection to its origins in Ireland. The button serves as a mark of identity and heritage for the soldiers of the regiment.