The members of the Saint Patrick's Battalion had been unhappy with their treatment in the US Army, and switched sides for the promise of better conditions, higher wages and land grants.
The members of the Saint Patrick's Battalion had been unhappy with their treatment in the US Army. The members of the Saint Patrick's Battalion switched sides for the promise of better conditions. The members of the Saint Patrick's Battalion switched sides for the promise of higher wages. The members of the Saint Patrick's Battalion switched sides for the promise of land grants. Another hypothesis is this.