On 19 March, the first Allied act to secure the no-fly zone began when French military jets entered Libyan airspace on a reconnaissance mission heralding attacks on enemy targets. Allied military action to enforce the ceasefire commenced the same day when a French aircraft opened fire and destroyed a vehicle on the ground. French jets also destroyed five tanks belonging to the Gaddafi regime. The United States and United Kingdom launched attacks on over 20 "integrated air defense systems" using more than 110 Tomahawk cruise missiles during operations Odyssey Dawn and Ellamy.