1. The engineers made pontoons so that they could easily cross rivers.
2. They dug beneath the enemy's city walls to weaken them.
3. Used battering rams to hammered the enemy city's gates.
The 15th century....I think
- - The President of the United States when the United States annexed Hawaii as a territory and when it fought the Spanish-American War was <span>William Mckinley</span><span>
- - Final answer:D</span>
