Complex sentence: In the 1880s G Division was pitted against separatist insurgents including the Invincibles, the Land League and even the Irish Parliamentary Party, arresting Charles Stewart Parnell in 1881.
Split into simpler sentences: In the 1880s G Division was pitted against separatist insurgents including the Invincibles. It also operated against the Land League and even the Irish Parliamentary Party, arresting Charles Stewart Parnell in 1881.