some further translation attempts...
1. indeed we have well been on our guard against him
2. the army has been led against the middle of the enemy
3. the enemy have been gathered and drawn up together
4. Artaxerxes had made ready for war
5. these soldiers have been well drawn up
6. I have gladly obeyed this captain
7. this general had posted on the left
8. the generals had been brought to/into ...