Answer:
siege, ratify, ambush
Explanation:
Siege: Act of fencing. Arrangement of troops around a square or fortress they are approaching as closely as possible.
"Siege was one of the most common military tactics of the Middle Ages."
Ratify: validate something agreed or contracted, confirm, reaffirm, keep your word. In the case of the government, for example, when Congress decrees a law and the President of the Republic sanctions it, it ratifies it.
"In a public letter, the chairman of the board of directors ratified to the shareholders his irrevocable decision to resign."
Ambush: From the Italian "ïmboscata¨, hence the term ambush, which originally meant hiding something in a forest. Those who ambush hide to attack by surprise.
"John really is a coward, he just attacks in ambush."
