Simplify the following text for a Grade 5 native English-speaking person.
Original: The May Coup d' Ã tat ( or ) was a coup d' Ã tat successfully carried out in Poland by Marshal JÃ zef PiÅ sudski between 12 and 14 May 1926 .
Simplified: May Coup was a coup d' Ã tat that happened in Poland in May 1926 .