The Northern Alliance was important to U.S. troops for several reasons:
1. **Strategic Alliances**: The Northern Alliance, consisting of various Afghan factions opposed to the Taliban regime, provided crucial local support and intelligence to U.S. troops during the early stages of the War in Afghanistan in 2001.
2. **Ground Support**: The Northern Alliance fighters, with their knowledge of the local terrain and the enemy's movements, were able to work closely with U.S. forces to conduct coordinated military operations on the ground.
3. **Combat Assistance**: The Northern Alliance fighters actively engaged in combat alongside U.S. troops, helping to weaken the Taliban's hold on key areas and facilitate the overthrow of the Taliban regime.
4. **Coordination**: Their cooperation and coordination with U.S. troops allowed for more effective planning and execution of military campaigns, leading to strategic victories against the Taliban forces.
In summary, the Northern Alliance's support was instrumental in enabling U.S. troops to achieve their military objectives in Afghanistan by providing crucial local knowledge, combat assistance, and strategic alliances during the conflict.