The apostles were not martyred on the day of pentecost where everyone was gathered. But in various countries that they ended up preaching the Gospel. Some historical study and using a map of where they were Martyred would help you a great deal to get a better picture of scripture, timelines, environments and people involved in various historical events recorded.
Are you saying if the apostles were not outnumbered, they would have used swords? Why didnt they carry it at that point of time?
For eg. Thomas in India.
And thanks for the suggestion, however my question had nothing to do with geographical or historical context.