RAF Chinook helicopters have been seen flying around Greater Manchester and the North West over the past few days.
According to the RAF, Chinook helicopters are currently being used for an exercise called Joint Warrior and will operate in the north of England and Scotland in the coming weeks.
This is to train its staff to be the very best with the Royal Navy, RAF and British Army, all involved.
Forces from other nations are also involved in this training.
These fly from RAF Odiham near Basingstoke and can be seen in the northwest over the next few weeks.
A spokesman for RAF Odiham said: “Over the next few weeks, RAF Odiham Chinook helicopters will be operating in the North of England and Scotland while on Exercise Joint Warrior.
“They will do low-flying, large formations and tactical operations all day and night.
“Motion Joint Warrior is an opportunity for staff across the Joint Helicopter Command to train its people to be the very best by bringing together members of the Royal Navy, RAF and British Army as well as forces from other nations.”