Complex sentence: The Glee Club had never had the membership base or the financial resources to attempt an international trip before, but in the spring of 1955, a four-week trip to Western Europe was undertaken, and it was a great success.
Split into simpler sentences: The Glee Club had never had the membership base or the financial resources to attempt an international trip before. But in the spring of 1955, a four-week trip to Western Europe was undertaken, and it was a great success.