As of the battle of Hoth, the Rebel fleet was scattered across the galaxy. The loss of their main base of operations (Hoth) was obviously a significant blow, so they spent quite a lot of time running from the Imperial fleet and trying to regroup without being followed.
"There is something going on in time and space, and beyond time and space, which, whether we like it or not, spells duty." -Winston Churchill
"For of all sad words of tongue or pen, The saddest are these: 'It might have been!'" -John Whittier
"Apathy is death." -Kreia