Whilst in Lebanon, the PLO was able to mount several attacks on Israel from vantage points along the border. The time in Lebanon also afforded the PLO space and resources with which to plan activities in support of the wider cause, including the Munich massacre. Attacks into Israel, including rocket attacks, became the catalyst for Israeli invasions into Lebanon, first in 1978 and again subsequently and decisively in 1982. Although PLO attacks were able to cause disruption, it is not possible to say that they achieved any lasting military gain.