Datu Sikatuna (or Catunao) was a Datu or chieftain of the Bool Kingdom (or Kedatuan of Dapitan) in the island of Bohol in the Philippines. He made a blood compact (sanduguan) and alliance with the Spanish explorer Miguel López de Legazpi on March 25, 1565 at Hinawanan Bay, barangay Hinawanan, Loay. Their blood compact is the first Treaty of Friendship between Spain and the Philippines. The previous site of the pact was thought to have been at barangay Bool, Tagbilaran City but later a panel of historians concluded that the event actually happened at barangay Hinawanan, Loay, Bohol as ratified through Resolution No. 4, issued by the National Historical Institute in 2005. Bool Kingdom The brothers, Datu Pagbuaya and Datu Dailisan, were rulers of the Kedatuan (Kingdom) of Dapitan (Bool Kingdom) before the arrival of the Spaniards. The vast kingdom has control over the present-day Bohol, Siquijor, Tanjay, Northern Mindanao from Zamboanga to Surigao; Southern Leyte, and Eastern Mindanao up to Davao Oriental, with its capital at Tagbilaran Strait. Datu Sigala and Datu Sikatuna were relatives of the two previously mentioned brothers, recorded as minor chiefs. Sigala was older than Sikatuna, who was said to have a higher rank. The auxiliary word "Si" is the nominative prefix for minor chiefs of the Visayas, such as Si Catipan, Si Batumay, Si Maquio, and Si Cabon of Cebu, which is also similar to the Sanskrit Sri honorific also used among other precolonial Philippine rulers, such as Sipad the Older, also known as Sri Pada of Lupah Sug. Sigala was the ruler of Loboc centered in barangay Himilian, while Sikatuna was the chief of Baclayon with his seat of government at barangay Guiwanon. When the Sultanate of Ternate with the help of the Portuguese attacked Panglao in 1563, the surviving royal family sought refuge in Dapitan. After the battle, Sikatuna was heavily wounded and Sigala took him in Himilian, Loboc to recuperate. Sigala and Sikatuna chose to remain in Bohol and eventually became the caretakers of the kingdom. The destruction of the kingdom was earlier prophesied by a 15th-century babaylan (medium) named Karyapa (or Caryapa), the first known native poet of the pre-Philippines. Arrival of Legaspi On November 21, 1564, El Adelantado Governor-General Miguel López de Legaspi led an expedition and departed from Barra de Navidad, Mexico (formerly Nueva España) in search for spices and the Spice Islands as commissioned by Viceroy Luis