Choose a word from the box to complete the sentences below, using an appropriate form.

1. A bomber disguised as a police officer killed 15 people in an attack today.
2. The UN sent in a force to keep the two sides in the civil war apart.
3. A convoy of lorries was by enemy soldiers in a remote valley yesterday.
4. International monitored the election and concluded that it had been fair.
5. The government has war on the drug cartels for the last ten years.
6. The of the city lasted six months before the enemy troops were pushed back.
7. After a year of fighting, the two sides agreed to a to enable peace negotiations to start.
8. The army fought a long to free the country from the enemy forces.