Complex sentence: Franco's Spanish Army of Africa troops were fundamental in raising the fortunes of the "alzamiento" which had hitherto been mainly beaten by the Republican loyalists, and on 6 August 1936, African troops were transported to Spain aboard four merchant ships.
Split into simpler sentences: Franco's Spanish Army of Africa troops were fundamental in raising the fortunes of the "alzamiento" which had hitherto been mainly beaten by the Republican loyalists. On 6 August 1936, African troops were transported to Spain aboard four merchant ships.