This "would" is translated as "past will", but I doubt if it's a habitual action in the past. This looks dubious. What do you think?

330-93
ex)In the sixteenth century, Portuguese missionaries tried for years to convert the people of Japan to Catholicism, while at the same time Portugal had a monopoly on trade between Japan and Europe.., When the Dutch began to arrive in Japan in great numbers, Ieyasu was much relieved. He needed Europeans for their know-how in guns and navigation, and here at last were Europeans who cared nothing for spreading religion - the Dutch wanted only to trade. Ieyasu swiftly drove out Portuguese. From then on, he would only deal with the practical-minded Dutch.