May I add to that? ;o)
...the importance, reward and requirement for the Muslims to perform Jihaad Fi Sabeel Lillah i.e. physical struggle:...the saying and actions of Muhammad (Salalahu Alaihi Wasallam) show that Jihaad definitely is to start (offensive) fighting the kuffar to make the Words of Allah the highest and to propagate (da’wa) the call of Islam. Muhammad (Salalahu Alaihi Wasallam) said:
"I have been ordered to fight the people until they bear witness that, ‘there is no god but Allah and Muhammad is His Messenger’ and they establish the prayer and the zakat. And if they do this, then from me is protected their blood and their wealth except by the right granted by Allah."As for his (Salalahu Alaihi Wasallam) actions, they are full of actions that show Jihaad is to start the fighting. So when he went out to Badr to take the caravan belonging to the Quraysh, this was going out to fight, this is offensive – as Muhammad (Salalahu Alaihi Wasallam) initiated the action before the Quraysh. Likewise, when Muhammad (Salalahu Alaihi Wasallam) invaded Hawazin in the battle of Hunayn, when he (Salalahu Alaihi Wasallam) seiged Ta’if and the battle of Mutah to fight the Romans and the Battle of Tabuk – all of these are evidences to show that Jihaad is to start fighting kuffar (offensive). This should clarify the erroneous view that in origin Jihaad is defensive...
Thanks for the addition USF!