Aspects of this topic are discussed in the following places at Britannica.
The crusading aspect of the expansion reached its apogee with Albuquerque, who nourished grandiose schemes for blockading the Red Sea and capturing Mecca. Duarte Galvão’s attempts to persuade other European courts to join a crusade met with little response. The arrival of an Abyssinian envoy at Manuel’s court in 1514 suggested an alliance with the Christian negus (king) of that country,...
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