Complex sentence: Originally formed from Rifle Volunteer Corps, which were established after a French invasion scare of 1859, the unit became part of the newly established London Regiment on the formation of the Territorial Force in 1908.
Split into simpler sentences: Originally formed from Rifle Volunteer Corps, which were established after a French invasion scare of 1859. The unit became part of the newly established London Regiment on the formation of the Territorial Force in 1908.