Meanwhile Jelacic retreated, sent the Croatian militias home, then stopped at Moson, where he waited for reinforcements. The army which beaten him followed, and reached the Austrian border on October 10th, after Jelacic finally decided to withdraw over. At Vienna Jelacic and Auersperg sat around waiting for more units heading from Bohemia and Moravia - who were already on their way from the 8th -, on the other side of the river Leitha the Hungarian army took positions, and their leaders started their debate what to do now.
Many of the officers who previously served in the Habsburg army struggled with both moral and legal dilemma, it was one thing to defend the country on the order of a legal government from foreign aggression, but it's a different thing to go against the will of the ruler (it was October 3 when Jelacic was made governor, and our government was denied of recognition) and even attack his majesty's troops on foreign lands, whom weren't just some Croat rabble, but maybe even old comrades.
Back at Pest the legislation also was in debate, how to proceed further. There was no question if we support the revolution in Wien, and they were promised help, but the representatives believed the only legal basis for intervention would be the request of the Austrian Reichstag. They were asked if they want it, but they weren't too enthusiastic.
Móga, the leader of our army at the border, was hesitant, moved his unit over the river to Austrian land on 21th, then withdrew on 22th. The new government (I think in English it's something liek National Defence Committee) was headed by Kossuth, and he took the matter in his hands. With some troops he went to Móga, recruiting along the way. He arrived on 23rd or 24th. They held a council of war where everyone told his piece. The officers expressed their doubts, they pointed out the enemy's superiority both in quality and quantity - by that time Windisch-Grätz were at Hetzendorf, South East Wien. It turned out that the feldmarschall even sent a letter where he ordered the "imperial" officers to deny fighting. Móga gave a choice to his staff follow their conscience, only a very few stood aside. Then Kossuth drafted a reply to Windish-Grätz, which tl;dr said: "Fuck you!"
On the 28th they moved into Austria, and approached the enemy. The rest I already wrote.