On 22 January 1641, Álvaro died under mysterious circumstances. Before an election to replace his brother could be held, Garcia moved forces from Mbamba to the capital and forcibly became king. Within a few weeks, Paulo, the Count of Soyo and longtime ally, died and was replaced by his and Garcia's enemy Daniel da Silva. Concurrently, the Dutch armada invaded and took the
Portuguese colony of
Luanda. Garcia immediately moved his armies south to assist the Dutch, as Kongo had a long-term pact to help the Dutch drive the Portuguese out of
Angola. In 1642, he received an embassy from the Dutch and signed an alliance and agreement, but refused to accept a
Calvinist preacher from them due to his
Catholic background. Garcia hoped that the Dutch would assist him in driving the Portuguese out of Angola, as these terms had been laid down as early as 1622 when
Pedro II of Kongo had proposed the Kongo-Dutch alliance. However, the Dutch were not as willing to press their attack home once they had taken Luanda. Instead, they hoped to make it a trading post and allowed the Portuguese to continue to possess their inland territories. Dutch soldiers, however, helped Garcia defeat a rebellion in the small southern district of Nsala in 1642, the slaves captured from this paying for Dutch expenses in taking Luanda. In 1643, as the relations between the
Dutch West India Company and the Portuguese broke down, Garcia's forces assisted in driving the Portuguese from their positions on the
Bengo River. However, the Dutch again refused to press home the attack, allowing the Portuguese to regroup further inland at
Massangano. Garcia could not commit more forces to the campaign against Portugal due to increasing hostility with Daniel da Silva. Thus, in 1645, he sought to drive Daniel from Soyo, but was defeated trying to take the Soyo fortified position at Mfinda Ngula. His son and would-be heir, Afonso, was captured while leading the Kongo forces, and a campaign to free him in 1646 failed. Because of these wars, Kongo could only send small forces when the Dutch declared war in alliance with Queen
Njinga of Matamba on the Portuguese in fear of the reinforced Portuguese driving them out of Luanda. Although the allies were successful at the
Battle of Kombi in 1647, they were unable to dislodge the Portuguese from their forts. Further reinforcements from Brazil in 1648 forced the Dutch to withdraw. ==Following the Portuguese Restoration==