Australian and United States military engineers have been putting the final touches to a newly improved school and water system in Lae in Papua New Guinea.
The troops are part of the US-led Pacific Partnership aid mission around the Pacific.
They've constructed new classrooms for Bubia Primary School which will house about 60 students.
They also built a water tower at the school to provide children with clean drinking water.
A spokeperson for Pacific Partnership says local people lined up to help and it was a chance for the US and Australian teams to get to know the local community and transfer skills.
He says it was also a chance for the troops to hone their construction skills outside a wartime environment.
The annual aid mission was established after the 2004 Indonesian earthquake and tsunami to build relationships and improve quality of life in the region.