Complex sentence: After a fire fight that lasted over an hour, the Indonesians were cleared from the top of the hill, however, the pressure from the company-sized position on the lower spur began to increase and the Gurkhas found themselves under pressure to withdraw.
Split into simpler sentences: After a fire fight that lasted over an hour, the Indonesians were cleared from the top of the hill. However the pressure from the company-sized position on the lower spur began to increase and the Gurkhas found themselves under pressure to withdraw.