I am a junior manager at a European branch of a US-based firm.
Our US-based colleagues and superiors often come over for major projects but always seem to keep a greater professional distance from those who are not from the US - they only mingle with other US people who are seconded or who are expatriated in Europe.
I believe the cause for this might be some deficiency in intercultural communication, though many Europeans confide to me that they perceive a slight attitude of superiority from the Americans due to them being from the "owning" country - I am not sure about this.
Anyway, I feel that when people from one nationality are more informal/comfortable and friendly only amongst themselves but exclude the others, it is not very pleasant to work together.
I have a some influence on launching social events and initiatives - but even at social events, the Americans just seem to snub the rest.
What can we do to help improve bonding between different cultures at the same company where the offices are located in different countries?