Complex sentence: Paget misinterpreted his orders for precautionary deployments as an immediate order to march against Ulster and, acting on his own initiative, he offered the officers under his command the choice of resignation rather than fighting against the Ulster Volunteers.
Split into simpler sentences: Paget misinterpreted his orders for precautionary deployments as an immediate order to march against Ulster. Acting on his own initiative, he offered the officers under his command the choice of resignation rather than fighting against the Ulster Volunteers.