"This proposed sale will contribute to the national security of the United States by improving the security of a friendly country which is an important force for political stability and economic progress in the Middle East, " said a Pentagon statement.

BBC: Saudi Arabia in $2.7bn US arms deal

The Blue Force Tracker uses satellite signals from friendly forces in the field to map their positions -- reducing the risk of so-called "friendly fire" incidents.

CNN: Technology links 101st on the battlefield

He then assaulted an enemy flanking force, successfully drawing their fire away from friendly Soldiers and ultimately forcing the enemy to retreat.

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