Complex sentence: After just under four weeks at sea, the troopship disembarked at Port Tewfik in Suez, before the battalion entrained for Palestine where it was attached to the 7th Division in support of the Syrian campaign against Vichy French forces.
Split into simpler sentences: After just under four weeks at sea, the troopship disembarked at Port Tewfik in Suez, where the battalion entrained for Palestine. There it was attached to the 7th Division in support of the Syrian campaign against Vichy French forces.