Immediately; as soon as God's will was manifested, they make no delay, not objecting against the journey. We endeavoured to go; St. Luke, the penman of this book was one of them that went, (the others were Paul, Silas, and Timotheus), and therefore speaks in the plural number.
Related Commentaries of Acts 16:10
Acts 16:10
10 And after he had seen the vision, immediately we endeavoured to go into Macedonia, assuredly gathering that the Lord had called us for to preach the gospel unto them.