The government had introduced the first Land Act in 1870, which proved largely ineffective. It was followed by the marginally more effective Land Acts of 1880 and 1881. These established a Land Commission that started to reduce some rents. Parnell together with all of his party lieutenants, including Father Eugene Sheehy known as "the Land League priest", went into a bitter verbal offensive and were imprisoned in October 1881 under the Irish Coercion Act in Kilmainham Jail for "sabotaging the Land Act", from where the "No-Rent Manifesto" was issued, calling for a national tenant farmer rent strike until "constitutional liberties" were restored and the prisoners freed. It had a modest success In Ireland, and mobilized financial and political support from the Irish Diaspora.