Satellites

I was just setting up this thread with otwo questions

1)In a war, for example if a country decided to knock out for example American satellites out of orbit, how would this affect the American war strategy, I am not saying US would loose but how would the war be different? How would they do without their satellites and what would it affect?(like exactly what things, like ie weapons etc)

2)In the future, how important will satellites be in war, for example in American case, are they becoming more dependant on satellites or more independant?