Complex sentence: At the turn of the century the barracks became depot of the Royal Northumberland Fusiliers who remained there until they were absorbed into the Royal Regiment of Fusiliers in 1962.
Split into simpler sentences: At the turn of the century the barracks became depot of the Royal Northumberland Fusiliers. The Royal Northumberland Fusiliers remained there until they were absorbed into the Royal Regiment of Fusiliers in 1962.