Q: Passage: The Suez Crisis or the Second Arab -- Israeli War also named the Tripartite Aggression (in the Arab world) and Operation Kadesh or Sinai War (in Israel), was an invasion of Egypt in late 1956 by Israel, followed by the United Kingdom and France. The aims were to regain Western control of the Suez Canal and to remove Egyptian President Gamal Abdel Nasser, who had just nationalized the canal. After the fighting had started, political pressure from the United States, the Soviet Union, and the United Nations led to a withdrawal by the three invaders. The episode humiliated Great Britain and France and strengthened Nasser.

Question: Based on this passage, when did britain go to war with egypt?
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To answer the above question, the relevant sentence is: The Suez Crisis or the Second Arab -- Israeli War also named the Tripartite Aggression (in the Arab world) and Operation Kadesh or Sinai War (in Israel), was an invasion of Egypt in late 1956 by Israel, followed by the United Kingdom and France. So the answer is late 1956.