Complex sentence: With the Treaty of Ryswick in 1697 King James's army in exile was disbanded, though many of its officers and men were reformed into new regiments, and having been merged into the original Irish Brigade these units served the French well until the French Revolution.
Split into simpler sentences: With the Treaty of Ryswick in 1697, King James's army in exile was disbanded, though many of its officers and men were reformed into new regiments. Having been merged into the original Irish Brigade these units served the French well until the French Revolution.