Johan Woldemar Hägglund (August 10, 1893 – February 12, 1963) was a Finnish lieutenant general during the Second World War, and an early volunteer of the Jäger Movement.

During his time in Germany, Hägglund fought for the imperial German Army on the Eastern Front of World War I as a member of the 27th Royal Prussian Jäger Battalion, taking part in several battles in the regions of Misa, Gulf of Riga and Lielupe.

The Germans had proposed an insurgency plan, where the first step was the insertion of a small team of Finnish volunteers by submarine to cut railway connections on the Karelian Isthmus.

[1][3] Following the October Revolution, on 17 November 1917 an 8-man team of Finnish Jäger movement members under the command of Hägglund was inserted by the German submarine UC-57 to Pernå.

He was soon after replaced by Aarne Sihvo, under whom Hägglund continued as the chief of staff of Army Corps Karelia (Finnish: Karjalan armeijakunta).

[1] Following the end of the civil war in 1918, Hägglund was posted as the chief of staff of the 3rd Division and from 1920 into 1921 he was a regimental deputy commander in Keski-Suomen Rykmentti.

[1] While in command of Keski-Suomen Rykmentti, Hägglund was supportive of the regimental Master Armorer Aimo Lahti, who had begun to plan an improved version of the German MP 18 submachine gun.

[4] Despite initial lukewarm reception by high ranking army officials,[4] Lahti would go on to develop several influential Finnish firearms such as the Suomi KP/-31 submachine gun.

[7][8] According to Nenye, Munter, Wirtanen and Birks, Hägglund's actions in the Winter War also "introduced the word motti into military jargon",[9] even if he himself is not credited with coming up with the term.

[13] During a reorganization of the Finnish forces prior to the onset of hostilities, the corps was moved to the southern flank of the Army of Karelia into a region spanning from the line Onkamo-Vyartsilya in the north to Pyhäjärvi in the south and now consisted of the 19th and 7th Divisions.

[16] The planned envelopment was completed in the morning of 15 July,[17] and split in two the Soviet 7th Army, with parts of the 168th and 71st Divisions being cut off north of Lake Ladoga.