Complex sentence: Under the terms of the Peace of Utrecht in 1713, the number of artillery pieces was reduced to ten, and a survey in 1766 reported that Gravesend was in good condition and equipped with ten nine-pound guns.
Split into simpler sentences: Under the terms of the Peace of Utrecht in 1713, the number of artillery pieces was reduced to ten. A survey in 1766 reported that Gravesend was in good condition and equipped with ten nine-pound guns.