passage: Among the early blows struck for independence was a rebellion in the town of Olhão .
  On 16 June 1808 , the townsfolk — armed with little more than ancient swords , spears , and stones — attacked and captured the local French garrison .
  It 's said that a party of local men then set sail from Olhão all the way to Brazil , without maps or navigational aids , to tell the king of the insurrection .
  The real battle , however , was waged under the leadership of the Duke of Wellington , whose coalition forces expelled the French after two years of bitter fighting .
  The war left Portugal further weakened , and in 1822 its major empire outpost , Brazil , declared independence .
  At the same time , a dispute over the crown continually raged between Pedro IV , the absentee monarch who preferred to reign as Emperor of Brazil rather than return to Portugal , and his brother Miguel .
  The power struggle , with strong overtones of absolutism versus liberalism , excited the interest and intervention of other powers .
  With British help , Pedro defeated Miguel off Cape St. Vincent in 1833 , and his expeditionary force marched to Lisbon .
  Pedro took the throne , though armed struggle continued for months and the lingering bitterness long after that .
  By 1892 Portugal , racked by wars and the continuing expense of maintaining its African colonies ( including those of Mozambique and Angola ) , declared itself bankrupt .
  The seeds of discontent with absolutist rule were sown .
  Kingdom 's End Bloodshed would haunt the remaining years of the Portuguese monarchy .
  On 1 February 1908 , the royal family was riding in an open carriage along the Lisbon river front plaza , Terreiro do Paço , when an assassin opened fire and killed King Carlos and the heir to the throne , Prince Luis Filipe .
  The prince 's younger brother , Prince Manuel , was also hit , but he survived and was thus propelled to the throne at the tender age of 19 .
  Amid republican agitation , a surprise uprising led by elements within the armed forces deposed Manuel in 1910 .
  Having ruled for less than three years , Manuel died in exile in 1932 in England .
  The sudden end of more than seven centuries of monarchy brought confusion and crisis to the country .
  Presidents and prime ministers were ushered into and out of office an unbelievable 45 times between 1910 and 1926 , until a military revolution suspended Portugal 's problematic democracy .
query_and_answer: Why did Prince Manuel only rule for three years ? || Brazil declared Indpendence
evidences: Amid republican agitation , a surprise uprising led by elements within the armed forces deposed Manuel in 1910 . Having ruled for less than three years , Manuel died in exile in 1932 in England .