What prevents the spaniards from succedding in their effort to leave the island?

What were you supposed to read to answer this question?

What island? When?

To understand why the Spaniards were unable to leave the island in your question, I assume you are referring to a specific historical event or context. Unfortunately, you haven't mentioned any specific island or time period. However, I can explain a general approach to identifying the factors that may have prevented the Spaniards from succeeding in such an effort.

1. Research the historical context: Start by researching the historical event or time period you are referring to, such as a specific battle, colonial period, or expedition. Look for details about the island, the purpose of the Spanish endeavor, and the opponents they faced.

2. Evaluate military forces: Assess the military capabilities and strengths of both the Spaniards and their opponents. Consider factors such as troop numbers, weaponry, and strategies employed by both sides.

3. Geographic and environmental obstacles: Determine if there were any geographical or environmental factors that hindered the Spaniards' departure from the island. For example, treacherous terrain, lack of resources, or inclement weather could have made it difficult for them to leave.

4. Naval challenges: Consider the state of Spanish naval power at the time. If they were attempting to leave by sea, evaluate the condition and size of their ships, as well as the presence of any hostile naval forces in the area.

5. Resistance and local alliances: Determine whether the Spaniards encountered resistance or opposition from local inhabitants or other factions on the island. Indigenous people or rival colonial powers might have organized resistance efforts to hinder Spanish departure.

6. Leadership and strategic mistakes: Assess the effectiveness of the Spanish leadership and their strategic decisions. Evaluate if any mistakes, misjudgments, or lack of resources played a role in preventing them from succeeding in leaving the island.

By considering these factors and conducting further research into the specific historical context, you can gain a better understanding of why the Spaniards may have struggled or failed to leave the island.