“The lightweight howitzer system is easy to tow and transport, with six howitzers fitting into a C-17 Globemaster III cargo plane. However, the M777’s reduced mobility compared to self-propelled howitzers makes it more vulnerable on the battlefield. Spotter drones used by both Russia and Ukraine make it easier to zero in on established artillery positions when they fire and employ counter-battery fire against them. As a result, many of Ukraine’s M777s have been damaged or destroyed.
With advanced air defense systems on both sides of the conflict, the use of fires in the Russo-Ukrainian War has fallen mostly to artillery. The Army’s move to acquire more M777s will replenish its stocks and ensure that the force is equipped to fight a similar war. BAE noted that total orders for the M777 currently exceed 1,200.”
https://www.yahoo.com/news/army-putting-popular-howitzer-back-041347451.html