Simplify the following text for a Grade 15 native English-speaking person.
Original: Working in coordination with a network of offices , chapters and supporters throughout the United States and affiliated organizations around the world , the ANCA actively advances the concerns of the Armenian American community on a broad range of issues .
Simplified: Working in coordination with a network of offices , chapters , and supporters throughout the country and affiliated organizations around the world , the ANCA advances the concerns of the Armenian American community on a broad range of issues .